diff --git a/.github/ci/docker-compose-test-ci.yml b/.github/ci/docker-compose-test-ci.yml
new file mode 100644
index 0000000..9dc4ef0
--- /dev/null
+++ b/.github/ci/docker-compose-test-ci.yml
@@ -0,0 +1,27 @@
+version: '3.8'
+
+services:
+  mongo:
+    image: mongo
+    restart: always
+    environment:
+      MONGO_INITDB_ROOT_USERNAME: root
+      MONGO_INITDB_ROOT_PASSWORD: password
+    volumes:
+      - db-data:/data/db
+
+  app:
+    depends_on:
+      - mongo
+    build:
+      context: '${GITHUB_WORKSPACE}'
+      dockerfile: Dockerfile-ci
+    environment:
+      - TEST_FIREBASE_CLIENT_API_KEY=${TEST_FIREBASE_CLIENT_API_KEY}
+      - GOOGLE_APPLICATION_CREDENTIALS=${GOOGLE_APPLICATION_CREDENTIALS}
+    ports:
+      - 8080:8080
+    command: 'npm run test-ci'
+
+volumes:
+  db-data:
diff --git a/.github/ci/firebase.gpg b/.github/ci/firebase.gpg
new file mode 100644
index 0000000..7a2e0df
Binary files /dev/null and b/.github/ci/firebase.gpg differ
diff --git a/.github/scripts/decrypt_firebase_secret.sh b/.github/scripts/decrypt_firebase_secret.sh
new file mode 100755
index 0000000..d53d3cf
--- /dev/null
+++ b/.github/scripts/decrypt_firebase_secret.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+# Script to decrypt firebase secret
+
+# Create the environment and decrypt the file
+mkdir $HOME/secrets
+gpg --quiet --batch --yes --decrypt --passphrase="$DECRYPTION_PASSPHRASE" --output firebase_secret.json ./.github/ci/firebase.gpg
\ No newline at end of file
diff --git a/.github/workflows/app-test-container.yml b/.github/workflows/app-test-container.yml
index f972f5a..0ae98e2 100644
--- a/.github/workflows/app-test-container.yml
+++ b/.github/workflows/app-test-container.yml
@@ -22,5 +22,13 @@ jobs:
       - name: docker layer caching
         uses: satackey/action-docker-layer-caching@v0.0.8
         continue-on-error: true
+      - name: descrypt firebase secret
+        run: ./.github/scripts/decrypt_firebase_secret.sh
+        env:
+          DECRYPTION_PASSPHRASE: ${{ secrets.DECRYPTION_PASSPHRASE }}
       - name: Run test in container
-        run: docker-compose --file docker-compose-test-ci.yml up --build --exit-code-from app
+        shell: bash
+        env:
+          TEST_FIREBASE_CLIENT_API_KEY: ${{ secrets.TEST_FIREBASE_CLIENT_API_KEY }}
+          GOOGLE_APPLICATION_CREDENTIALS: ./firebase_secret.json
+        run: docker-compose --file ./.github/ci/docker-compose-test-ci.yml up --build --exit-code-from app
diff --git a/.gitignore b/.gitignore
index 6704566..2bddac9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -102,3 +102,6 @@ dist
 
 # TernJS port file
 .tern-port
+
+# custom
+*firebase-adminsdk*.json
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
index 1209681..4798ca7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,9 +21,9 @@ COPY . .
 # The container environmental variables.
 ENV PORT=8080
 ENV MONGODB_URI=mongodb://root:password@mongo:27017/softwareRepository?authSource=admin
-ENV BCRYPT_SALT_ROUNDS=YOUR_BCRYPT_SALT_ROUNDS
 ENV TEST_MONGODB_URI=mongodb://root:password@mongo:27017/softwareRepositoryTest?authSource=admin
-ENV JWT_SECRET=YOUR_JWT_SECRET
+ENV TEST_FIREBASE_CLIENT_API_KEY=YOUR_TEST_FIREBASE_CLIENT_API_KEY
+ENV GOOGLE_APPLICATION_CREDENTIALS=YOUR_GOOGLE_SERVICE_ACCOUNT_FILE_PATH
 
 # The container listens on port 8080.
 EXPOSE 8080
diff --git a/Dockerfile-ci b/Dockerfile-ci
new file mode 100644
index 0000000..4798ca7
--- /dev/null
+++ b/Dockerfile-ci
@@ -0,0 +1,34 @@
+# SoftwareRepository's Dockerfile
+# With comments to aid in my learning of docker.
+
+# To use official nodejs base docker image.
+FROM node:12
+
+# The working directory where any subsequent instructions in the Dockerfile will be executed on.
+WORKDIR /app
+
+# I want to install dependencies first so they can be cache.
+# Hence, I copy the package.json file first to the work directory for installing the dependencies in the subsequent command (npm install).
+COPY package.json .
+
+# Run npm install to install the dependencies specified in package.json
+RUN npm install
+
+# After the dependencies are installed, I copy over the source code of the web application to the current working directory.
+# Note: In this case, I add .dockerignore file (similar to .gitignore) and add node_modules to the .dockerignore file so that my local node_modules directory will not be copied to the container's working directory.
+COPY . .
+
+# The container environmental variables.
+ENV PORT=8080
+ENV MONGODB_URI=mongodb://root:password@mongo:27017/softwareRepository?authSource=admin
+ENV TEST_MONGODB_URI=mongodb://root:password@mongo:27017/softwareRepositoryTest?authSource=admin
+ENV TEST_FIREBASE_CLIENT_API_KEY=YOUR_TEST_FIREBASE_CLIENT_API_KEY
+ENV GOOGLE_APPLICATION_CREDENTIALS=YOUR_GOOGLE_SERVICE_ACCOUNT_FILE_PATH
+
+# The container listens on port 8080.
+EXPOSE 8080
+
+# Should only have one cmd in a Dockerfile. Tells container how to run the application.
+# In this case, the command is npm start.
+# An exec form (Array of strings). It does not start up a shell session unlike run.
+CMD ["npm", "start"]
\ No newline at end of file
diff --git a/app.js b/app.js
index ba877b8..71183de 100644
--- a/app.js
+++ b/app.js
@@ -10,8 +10,8 @@ const usersRouter = require('./routes/api/users');
 
 const middleware = require('./utils/middleware');
 const logger = require('./utils/logger');
-const loginRouter = require('./routes/api/auth');
-const softwaresRouter = require('./routes/api/softwares');
+const authRouter = require('./routes/api/auth');
+const softwareRouter = require('./routes/api/software');
 
 const app = express();
 
@@ -59,8 +59,8 @@ app.use(
 // Routes
 app.use(rootRouter);
 app.use('/api/users', usersRouter);
-app.use('/api/auth', loginRouter);
-app.use('/api/softwares', softwaresRouter);
+app.use('/api/auth', authRouter);
+app.use('/api/software', softwareRouter);
 
 app.use(middleware.unknownEndPoint);
 app.use(middleware.errorHandler);
diff --git a/controllers/api/authController.js b/controllers/api/authController.js
index 36aa0a1..d4aad2f 100644
--- a/controllers/api/authController.js
+++ b/controllers/api/authController.js
@@ -15,10 +15,9 @@ const postAuth = async (req, res) => {
     },
   );
 
-  const passwordCorrect =
-    user === null
-      ? false
-      : await bcrypt.compare(body.password, user.passwordHash);
+  const passwordCorrect = user === null
+    ? false
+    : await bcrypt.compare(body.password, user.passwordHash);
 
   if (!(user && passwordCorrect)) {
     return res.status('401').json({
diff --git a/controllers/api/softwaresController.js b/controllers/api/softwareController.js
similarity index 89%
rename from controllers/api/softwaresController.js
rename to controllers/api/softwareController.js
index cb7fd65..9a9fb40 100644
--- a/controllers/api/softwaresController.js
+++ b/controllers/api/softwareController.js
@@ -3,7 +3,7 @@ const Software = require('../../models/software');
 const User = require('../../models/user');
 const databaseUtils = require('../../utils/databaseUtils');
 
-const getSoftwares = async (req, res) => {
+const getSoftware = async (req, res) => {
   const softwares = await Software.find({})
     .populate('meta.addedByUser', {
       username: 1,
@@ -16,9 +16,9 @@ const getSoftwares = async (req, res) => {
   res.status(200).json(softwares);
 };
 
-const postSoftwares = async (req, res) => {
+const postSoftware = async (req, res) => {
   const { body } = req;
-  const userId = body.decodedToken.id;
+  const userId = body.decodedToken.backendId;
 
   // Refer to software Model for required parameters.
   const softwareObject = {
@@ -60,10 +60,10 @@ const postSoftwares = async (req, res) => {
   return res.status(201).json(saved);
 };
 
-const putSoftware = async (req, res) => {
+const patchSoftwareById = async (req, res) => {
   const { id } = req.params;
   const { body } = req;
-  const userId = body.decodedToken.id;
+  const userId = body.decodedToken.backendId;
 
   // To configure dotObject transformation to not modify how the array is represented.
   dotObject.keepArray = true;
@@ -103,7 +103,7 @@ const putSoftware = async (req, res) => {
   return res.status(200).json(updated);
 };
 
-const getSoftware = async (req, res) => {
+const getSoftwareById = async (req, res) => {
   const { id } = req.params;
 
   const software = await Software.findById(id);
@@ -120,7 +120,7 @@ const getSoftware = async (req, res) => {
   return res.status(200).json(response);
 };
 
-const deleteSoftware = async (req, res) => {
+const deleteSoftwareById = async (req, res) => {
   const { id } = req.params;
 
   const response = await Software.findByIdAndDelete(id);
@@ -136,9 +136,9 @@ const deleteSoftware = async (req, res) => {
 };
 
 module.exports = {
-  getSoftwares,
-  postSoftwares,
-  putSoftware,
   getSoftware,
-  deleteSoftware,
+  postSoftware,
+  patchSoftwareById,
+  getSoftwareById,
+  deleteSoftwareById,
 };
diff --git a/controllers/api/usersController.js b/controllers/api/usersController.js
index 889ad3d..0d2611c 100644
--- a/controllers/api/usersController.js
+++ b/controllers/api/usersController.js
@@ -1,6 +1,6 @@
-const bcrypt = require('bcrypt');
 const User = require('../../models/user');
-const config = require('../../utils/config');
+const firebaseAdmin = require('../../utils/firebaseConfig');
+const jwtUtils = require('../../utils/jwtUtils');
 
 const getUsers = async (req, res) => {
   const users = await User.find({})
@@ -16,30 +16,27 @@ const getUsers = async (req, res) => {
 const postUsers = async (req, res) => {
   const { body } = req;
 
-  if (!body.password) {
-    return res.status(400).json({
-      error: '`password` is required.',
-    });
-  }
+  const authToken = jwtUtils.getReqAuthToken(req);
+  const decodedToken = await jwtUtils.verifyAuthToken(authToken, false);
 
-  if (body.password.length < 8) {
-    return res.status(400).json({
-      error: 'Password has to be at least 8 characters long.',
-    });
-  }
+  const response = await firebaseAdmin.auth().getUser(decodedToken.uid);
 
-  const saltRounds = config.BCRYPT_SALT_ROUNDS;
-  const passwordHash = await bcrypt.hash(body.password, saltRounds);
+  const userRecord = response.toJSON();
 
   const user = new User({
     username: body.username,
-    name: body.name,
-    email: body.email,
-    passwordHash,
+    name: userRecord.displayName,
+    email: userRecord.email,
+    firebaseUid: userRecord.uid,
   });
 
   const savedUser = await user.save();
 
+  // Set custom claim with backend user id (different from firebase user id)
+  await firebaseAdmin
+    .auth()
+    .setCustomUserClaims(decodedToken.uid, { backendId: savedUser.id });
+
   return res.status(201).json(savedUser);
 };
 
diff --git a/docker-compose-test-ci.yml b/docker-compose-test-ci.yml
deleted file mode 100644
index 50cd910..0000000
--- a/docker-compose-test-ci.yml
+++ /dev/null
@@ -1,22 +0,0 @@
-version: "3.8"
-
-services:
-  mongo:
-    image: mongo
-    restart: always
-    environment:
-      MONGO_INITDB_ROOT_USERNAME: root
-      MONGO_INITDB_ROOT_PASSWORD: password
-    volumes:
-      - db-data:/data/db
-      
-  app:
-    depends_on:
-      - mongo
-    build: .
-    ports:
-      - 8080:8080
-    command: "npm test"
-
-volumes:
-  db-data:
diff --git a/jest.config.js b/jest.config.js
index 25c9bac..6f30e29 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -1,3 +1,4 @@
 module.exports = {
   testEnvironment: 'node',
+  testPathIgnorePatterns: ['<rootDir>/tests/api/disabledAPINotTested'],
 };
diff --git a/models/software.js b/models/software.js
index 4901ddc..c05c58d 100644
--- a/models/software.js
+++ b/models/software.js
@@ -41,14 +41,10 @@ const softwareSchema = new mongoose.Schema(
       ],
       required: [true, 'Software homepage url is required'],
     },
-    platforms: {
-      type: [
-        {
-          type: String,
-          trim: true,
-          lowercase: true,
-        },
-      ],
+    platform: {
+      type: String,
+      trim: true,
+      lowercase: true,
       required: [true, 'Software platform is required'],
     },
     isActiveDevelopment: {
diff --git a/models/user.js b/models/user.js
index e2b3885..3172859 100644
--- a/models/user.js
+++ b/models/user.js
@@ -32,9 +32,14 @@ const userSchema = new mongoose.Schema(
       validate: [isEmail, 'A valid email address is required'],
       set: (value) => normalizeEmail(value),
     },
-    passwordHash: {
+    password: {
       type: String,
-      required: [true, 'Password hash is required'],
+      default: '',
+    },
+    firebaseUid: {
+      type: String,
+      required: [true, 'firebase user id is required.'],
+      unique: true,
     },
     roles: {
       type: [
@@ -110,7 +115,7 @@ userSchema.set('toJSON', {
     returnedObject.id = returnedObject._id.toString();
     delete returnedObject._id;
     delete returnedObject.__v;
-    delete returnedObject.passwordHash;
+    delete returnedObject.password;
   },
 });
 
diff --git a/package-lock.json b/package-lock.json
index 7962244..0d2c6e3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -480,6 +480,210 @@
         }
       }
     },
+    "@firebase/app-types": {
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/@firebase/app-types/-/app-types-0.6.1.tgz",
+      "integrity": "sha512-L/ZnJRAq7F++utfuoTKX4CLBG5YR7tFO3PLzG1/oXXKEezJ0kRL3CMRoueBEmTCzVb/6SIs2Qlaw++uDgi5Xyg=="
+    },
+    "@firebase/auth-interop-types": {
+      "version": "0.1.5",
+      "resolved": "https://registry.npmjs.org/@firebase/auth-interop-types/-/auth-interop-types-0.1.5.tgz",
+      "integrity": "sha512-88h74TMQ6wXChPA6h9Q3E1Jg6TkTHep2+k63OWg3s0ozyGVMeY+TTOti7PFPzq5RhszQPQOoCi59es4MaRvgCw=="
+    },
+    "@firebase/component": {
+      "version": "0.1.19",
+      "resolved": "https://registry.npmjs.org/@firebase/component/-/component-0.1.19.tgz",
+      "integrity": "sha512-L0S3g8eqaerg8y0zox3oOHSTwn/FE8RbcRHiurnbESvDViZtP5S5WnhuAPd7FnFxa8ElWK0z1Tr3ikzWDv1xdQ==",
+      "requires": {
+        "@firebase/util": "0.3.2",
+        "tslib": "^1.11.1"
+      }
+    },
+    "@firebase/database": {
+      "version": "0.6.13",
+      "resolved": "https://registry.npmjs.org/@firebase/database/-/database-0.6.13.tgz",
+      "integrity": "sha512-NommVkAPzU7CKd1gyehmi3lz0K78q0KOfiex7Nfy7MBMwknLm7oNqKovXSgQV1PCLvKXvvAplDSFhDhzIf9obA==",
+      "requires": {
+        "@firebase/auth-interop-types": "0.1.5",
+        "@firebase/component": "0.1.19",
+        "@firebase/database-types": "0.5.2",
+        "@firebase/logger": "0.2.6",
+        "@firebase/util": "0.3.2",
+        "faye-websocket": "0.11.3",
+        "tslib": "^1.11.1"
+      }
+    },
+    "@firebase/database-types": {
+      "version": "0.5.2",
+      "resolved": "https://registry.npmjs.org/@firebase/database-types/-/database-types-0.5.2.tgz",
+      "integrity": "sha512-ap2WQOS3LKmGuVFKUghFft7RxXTyZTDr0Xd8y2aqmWsbJVjgozi0huL/EUMgTjGFrATAjcf2A7aNs8AKKZ2a8g==",
+      "requires": {
+        "@firebase/app-types": "0.6.1"
+      }
+    },
+    "@firebase/logger": {
+      "version": "0.2.6",
+      "resolved": "https://registry.npmjs.org/@firebase/logger/-/logger-0.2.6.tgz",
+      "integrity": "sha512-KIxcUvW/cRGWlzK9Vd2KB864HlUnCfdTH0taHE0sXW5Xl7+W68suaeau1oKNEqmc3l45azkd4NzXTCWZRZdXrw=="
+    },
+    "@firebase/util": {
+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/@firebase/util/-/util-0.3.2.tgz",
+      "integrity": "sha512-Dqs00++c8rwKky6KCKLLY2T1qYO4Q+X5t+lF7DInXDNF4ae1Oau35bkD+OpJ9u7l1pEv7KHowP6CUKuySCOc8g==",
+      "requires": {
+        "tslib": "^1.11.1"
+      }
+    },
+    "@google-cloud/common": {
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/@google-cloud/common/-/common-3.4.1.tgz",
+      "integrity": "sha512-e5z0CwsM0RXky+PnyPtQ3QK46ksqm+kE7kX8pm8X+ddBwZJipHchKeazMM5fLlGCS+AALalzXb+uYmH72TRnpQ==",
+      "optional": true,
+      "requires": {
+        "@google-cloud/projectify": "^2.0.0",
+        "@google-cloud/promisify": "^2.0.0",
+        "arrify": "^2.0.1",
+        "duplexify": "^4.1.1",
+        "ent": "^2.2.0",
+        "extend": "^3.0.2",
+        "google-auth-library": "^6.1.1",
+        "retry-request": "^4.1.1",
+        "teeny-request": "^7.0.0"
+      }
+    },
+    "@google-cloud/firestore": {
+      "version": "4.7.0",
+      "resolved": "https://registry.npmjs.org/@google-cloud/firestore/-/firestore-4.7.0.tgz",
+      "integrity": "sha512-srkT0LxbKBEo3hWlgjJenT6+bPJK4D+vuKiV/EZFc6sWhDNQwgOgKF6Rf16mggHwKOL9Sx08Veu0BUaX1uyh4g==",
+      "optional": true,
+      "requires": {
+        "fast-deep-equal": "^3.1.1",
+        "functional-red-black-tree": "^1.0.1",
+        "google-gax": "^2.2.0"
+      }
+    },
+    "@google-cloud/paginator": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/@google-cloud/paginator/-/paginator-3.0.5.tgz",
+      "integrity": "sha512-N4Uk4BT1YuskfRhKXBs0n9Lg2YTROZc6IMpkO/8DIHODtm5s3xY8K5vVBo23v/2XulY3azwITQlYWgT4GdLsUw==",
+      "optional": true,
+      "requires": {
+        "arrify": "^2.0.0",
+        "extend": "^3.0.2"
+      }
+    },
+    "@google-cloud/projectify": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/@google-cloud/projectify/-/projectify-2.0.1.tgz",
+      "integrity": "sha512-ZDG38U/Yy6Zr21LaR3BTiiLtpJl6RkPS/JwoRT453G+6Q1DhlV0waNf8Lfu+YVYGIIxgKnLayJRfYlFJfiI8iQ==",
+      "optional": true
+    },
+    "@google-cloud/promisify": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/@google-cloud/promisify/-/promisify-2.0.3.tgz",
+      "integrity": "sha512-d4VSA86eL/AFTe5xtyZX+ePUjE8dIFu2T8zmdeNBSa5/kNgXPCx/o/wbFNHAGLJdGnk1vddRuMESD9HbOC8irw==",
+      "optional": true
+    },
+    "@google-cloud/storage": {
+      "version": "5.4.0",
+      "resolved": "https://registry.npmjs.org/@google-cloud/storage/-/storage-5.4.0.tgz",
+      "integrity": "sha512-3sp1y6og1vEUgiN7s9SkP1zKwjsFKqBSz9y8KJKblyy2gfZnMLm4Sdw4oeZrQsDG6UKAbKq1KHe36b72SHeMIg==",
+      "optional": true,
+      "requires": {
+        "@google-cloud/common": "^3.3.0",
+        "@google-cloud/paginator": "^3.0.0",
+        "@google-cloud/promisify": "^2.0.0",
+        "arrify": "^2.0.0",
+        "compressible": "^2.0.12",
+        "date-and-time": "^0.14.0",
+        "duplexify": "^4.0.0",
+        "extend": "^3.0.2",
+        "gaxios": "^4.0.0",
+        "gcs-resumable-upload": "^3.1.0",
+        "get-stream": "^6.0.0",
+        "hash-stream-validation": "^0.2.2",
+        "mime": "^2.2.0",
+        "mime-types": "^2.0.8",
+        "onetime": "^5.1.0",
+        "p-limit": "^3.0.1",
+        "pumpify": "^2.0.0",
+        "snakeize": "^0.1.0",
+        "stream-events": "^1.0.1",
+        "xdg-basedir": "^4.0.0"
+      },
+      "dependencies": {
+        "get-stream": {
+          "version": "6.0.0",
+          "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-6.0.0.tgz",
+          "integrity": "sha512-A1B3Bh1UmL0bidM/YX2NsCOTnGJePL9rO/M+Mw3m9f2gUpfokS0hi5Eah0WSUEWZdZhIZtMjkIYS7mDfOqNHbg==",
+          "optional": true
+        },
+        "mime": {
+          "version": "2.4.6",
+          "resolved": "https://registry.npmjs.org/mime/-/mime-2.4.6.tgz",
+          "integrity": "sha512-RZKhC3EmpBchfTGBVb8fb+RL2cWyw/32lshnsETttkBAyAUXSGHxbEJWWRXc751DrIxG1q04b8QwMbAwkRPpUA==",
+          "optional": true
+        },
+        "p-limit": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-3.0.2.tgz",
+          "integrity": "sha512-iwqZSOoWIW+Ew4kAGUlN16J4M7OB3ysMLSZtnhmqx7njIHFPlxWBX8xo3lVTyFVq6mI/lL9qt2IsN1sHwaxJkg==",
+          "optional": true,
+          "requires": {
+            "p-try": "^2.0.0"
+          }
+        }
+      }
+    },
+    "@grpc/grpc-js": {
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       "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-2.0.0.tgz",
-      "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==",
-      "dev": true
+      "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg=="
     },
     "require_optional": {
       "version": "1.0.1",
@@ -6584,6 +7363,32 @@
       "integrity": "sha512-TTlYpa+OL+vMMNG24xSlQGEJ3B/RzEfUlLct7b5G/ytav+wPrplCpVMFuwzXbkecJrb6IYo1iFb0S9v37754mg==",
       "dev": true
     },
+    "retry-request": {
+      "version": "4.1.3",
+      "resolved": "https://registry.npmjs.org/retry-request/-/retry-request-4.1.3.tgz",
+      "integrity": "sha512-QnRZUpuPNgX0+D1xVxul6DbJ9slvo4Rm6iV/dn63e048MvGbUZiKySVt6Tenp04JqmchxjiLltGerOJys7kJYQ==",
+      "optional": true,
+      "requires": {
+        "debug": "^4.1.1"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.2.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.2.0.tgz",
+          "integrity": "sha512-IX2ncY78vDTjZMFUdmsvIRFY2Cf4FnD0wRs+nQwJU8Lu99/tPFdb0VybiiMTPe3I6rQmwsqQqRBvxU+bZ/I8sg==",
+          "optional": true,
+          "requires": {
+            "ms": "2.1.2"
+          }
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
+          "optional": true
+        }
+      }
+    },
     "rimraf": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
@@ -6959,6 +7764,12 @@
       "resolved": "https://registry.npmjs.org/sliced/-/sliced-1.0.1.tgz",
       "integrity": "sha1-CzpmK10Ewxd7GSa+qCsD+Dei70E="
     },
+    "snakeize": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/snakeize/-/snakeize-0.1.0.tgz",
+      "integrity": "sha1-EMCI2LWOsHazIpu1oE4jLOEmQi0=",
+      "optional": true
+    },
     "snapdragon": {
       "version": "0.8.2",
       "resolved": "https://registry.npmjs.org/snapdragon/-/snapdragon-0.8.2.tgz",
@@ -7229,6 +8040,26 @@
       "integrity": "sha1-NbCYdbT/SfJqd35QmzCQoyJr8ks=",
       "dev": true
     },
+    "stream-events": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/stream-events/-/stream-events-1.0.5.tgz",
+      "integrity": "sha512-E1GUzBSgvct8Jsb3v2X15pjzN1tYebtbLaMg+eBOUOAxgbLoSbT2NS91ckc5lJD1KfLjId+jXJRgo0qnV5Nerg==",
+      "optional": true,
+      "requires": {
+        "stubs": "^3.0.0"
+      }
+    },
+    "stream-shift": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/stream-shift/-/stream-shift-1.0.1.tgz",
+      "integrity": "sha512-AiisoFqQ0vbGcZgQPY1cdP2I76glaVA/RauYR4G4thNFgkTqr90yXTo4LYX60Jl+sIlPNHHdGSwo01AvbKUSVQ==",
+      "optional": true
+    },
+    "streamsearch": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/streamsearch/-/streamsearch-0.1.2.tgz",
+      "integrity": "sha1-gIudDlb8Jz2Am6VzOOkpkZoanxo="
+    },
     "string-length": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/string-length/-/string-length-4.0.1.tgz",
@@ -7260,7 +8091,6 @@
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.0.tgz",
       "integrity": "sha512-zUz5JD+tgqtuDjMhwIg5uFVV3dtqZ9yQJlZVfq4I01/K5Paj5UHj7VyrQOJvzawSVlKpObApbfD0Ed6yJc+1eg==",
-      "dev": true,
       "requires": {
         "emoji-regex": "^8.0.0",
         "is-fullwidth-code-point": "^3.0.0",
@@ -7270,26 +8100,22 @@
         "ansi-regex": {
           "version": "5.0.0",
           "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.0.tgz",
-          "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==",
-          "dev": true
+          "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg=="
         },
         "emoji-regex": {
           "version": "8.0.0",
           "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
-          "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-          "dev": true
+          "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A=="
         },
         "is-fullwidth-code-point": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
-          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
-          "dev": true
+          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg=="
         },
         "strip-ansi": {
           "version": "6.0.0",
           "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.0.tgz",
           "integrity": "sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==",
-          "dev": true,
           "requires": {
             "ansi-regex": "^5.0.0"
           }
@@ -7356,6 +8182,12 @@
       "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
       "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo="
     },
+    "stubs": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/stubs/-/stubs-3.0.0.tgz",
+      "integrity": "sha1-6NK6H6nJBXAwPAMLaQD31fiavls=",
+      "optional": true
+    },
     "superagent": {
       "version": "6.1.0",
       "resolved": "https://registry.npmjs.org/superagent/-/superagent-6.1.0.tgz",
@@ -7523,6 +8355,19 @@
         "yallist": "^3.0.3"
       }
     },
+    "teeny-request": {
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/teeny-request/-/teeny-request-7.0.1.tgz",
+      "integrity": "sha512-sasJmQ37klOlplL4Ia/786M5YlOcoLGQyq2TE4WHSRupbAuDaQW0PfVxV4MtdBtRJ4ngzS+1qim8zP6Zp35qCw==",
+      "optional": true,
+      "requires": {
+        "http-proxy-agent": "^4.0.0",
+        "https-proxy-agent": "^5.0.0",
+        "node-fetch": "^2.6.1",
+        "stream-events": "^1.0.5",
+        "uuid": "^8.0.0"
+      }
+    },
     "term-size": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/term-size/-/term-size-2.2.0.tgz",
@@ -7684,6 +8529,11 @@
         }
       }
     },
+    "tslib": {
+      "version": "1.14.1",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz",
+      "integrity": "sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg=="
+    },
     "tunnel-agent": {
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
@@ -7733,7 +8583,6 @@
       "version": "3.1.5",
       "resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz",
       "integrity": "sha512-zdu8XMNEDepKKR+XYOXAVPtWui0ly0NtohUscw+UmaHiAWT8hrV1rr//H6V+0DvJ3OQ19S979M0laLfX8rm82Q==",
-      "dev": true,
       "requires": {
         "is-typedarray": "^1.0.0"
       }
@@ -7763,7 +8612,6 @@
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/unique-string/-/unique-string-2.0.0.tgz",
       "integrity": "sha512-uNaeirEPvpZWSgzwsPGtU2zVSTrn/8L5q/IexZmH0eH6SA73CmAA5U4GwORTxQAZs95TAXLNqeLoPPNO5gZfWg==",
-      "dev": true,
       "requires": {
         "crypto-random-string": "^2.0.0"
       }
@@ -7878,7 +8726,6 @@
       "version": "8.3.1",
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.1.tgz",
       "integrity": "sha512-FOmRr+FmWEIG8uhZv6C2bTgEVXsHk08kE7mPlrBbEe+c3r9pjceVPgupIfNIhc4yx55H69OXANrUaSuu9eInKg==",
-      "dev": true,
       "optional": true
     },
     "v8-compile-cache": {
@@ -7970,6 +8817,21 @@
       "integrity": "sha512-qBIvFLGiBpLjfwmYAaHPXsn+ho5xZnGvyGvsarywGNc8VyQJUMHJ8OBKGGrPER0okBeMDaan4mNBlgBROxuI8w==",
       "dev": true
     },
+    "websocket-driver": {
+      "version": "0.7.4",
+      "resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.7.4.tgz",
+      "integrity": "sha512-b17KeDIQVjvb0ssuSDF2cYXSg2iztliJ4B9WdsuB6J952qCPKmnVq4DyW5motImXHDC1cBT/1UezrJVsKw5zjg==",
+      "requires": {
+        "http-parser-js": ">=0.5.1",
+        "safe-buffer": ">=5.1.0",
+        "websocket-extensions": ">=0.1.1"
+      }
+    },
+    "websocket-extensions": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/websocket-extensions/-/websocket-extensions-0.1.4.tgz",
+      "integrity": "sha512-OqedPIGOfsDlo31UNwYbCFMSaO9m9G/0faIHj5/dZFDMFqPTcx6UwqyOy3COEaEOg/9VsGIpdqn62W5KhoKSpg=="
+    },
     "whatwg-encoding": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-1.0.5.tgz",
@@ -8007,8 +8869,7 @@
     "which-module": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
-      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
-      "dev": true
+      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
     },
     "wide-align": {
       "version": "1.1.3",
@@ -8061,7 +8922,6 @@
       "version": "6.2.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
       "integrity": "sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==",
-      "dev": true,
       "requires": {
         "ansi-styles": "^4.0.0",
         "string-width": "^4.1.0",
@@ -8071,14 +8931,12 @@
         "ansi-regex": {
           "version": "5.0.0",
           "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.0.tgz",
-          "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==",
-          "dev": true
+          "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg=="
         },
         "strip-ansi": {
           "version": "6.0.0",
           "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.0.tgz",
           "integrity": "sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==",
-          "dev": true,
           "requires": {
             "ansi-regex": "^5.0.0"
           }
@@ -8103,7 +8961,6 @@
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
       "integrity": "sha512-AvHcyZ5JnSfq3ioSyjrBkH9yW4m7Ayk8/9My/DD9onKeu/94fwrMocemO2QAJFAlnnDN+ZDS+ZjAR5ua1/PV/Q==",
-      "dev": true,
       "requires": {
         "imurmurhash": "^0.1.4",
         "is-typedarray": "^1.0.0",
@@ -8120,8 +8977,7 @@
     "xdg-basedir": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/xdg-basedir/-/xdg-basedir-4.0.0.tgz",
-      "integrity": "sha512-PSNhEJDejZYV7h50BohL09Er9VaIefr2LMAf3OEmpCkjOi34eYyQYAXUTjEQtZJTKcF0E2UKTh+osDLsgNim9Q==",
-      "dev": true
+      "integrity": "sha512-PSNhEJDejZYV7h50BohL09Er9VaIefr2LMAf3OEmpCkjOi34eYyQYAXUTjEQtZJTKcF0E2UKTh+osDLsgNim9Q=="
     },
     "xml-name-validator": {
       "version": "3.0.0",
@@ -8138,8 +8994,7 @@
     "y18n": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
-      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
-      "dev": true
+      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w=="
     },
     "yallist": {
       "version": "3.1.1",
@@ -8150,7 +9005,6 @@
       "version": "15.4.1",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.4.1.tgz",
       "integrity": "sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==",
-      "dev": true,
       "requires": {
         "cliui": "^6.0.0",
         "decamelize": "^1.2.0",
@@ -8169,7 +9023,6 @@
       "version": "18.1.3",
       "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
       "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
-      "dev": true,
       "requires": {
         "camelcase": "^5.0.0",
         "decamelize": "^1.2.0"
diff --git a/package.json b/package.json
index 7a766c8..12c1f5f 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,7 @@
     "test": "cross-env NODE_ENV=test jest --verbose --runInBand",
     "test-debug": "cross-env NODE_ENV=test jest --verbose --runInBand --detectOpenHandles",
     "test-coverage": "cross-env CI=true npm test -- --coverage",
+    "test-ci": "cross-env NODE_ENV=test jest --verbose --runInBand --forceExit",
     "lint": "eslint .  --fix"
   },
   "repository": {
@@ -31,6 +32,7 @@
   },
   "homepage": "https://github.com/learnsoftwaredevelopment/SoftwareRepository#readme",
   "dependencies": {
+    "axios": "^0.21.0",
     "bcrypt": "^5.0.0",
     "cors": "^2.8.5",
     "cross-env": "^7.0.2",
@@ -38,6 +40,7 @@
     "dotenv": "^8.2.0",
     "express": "^4.17.1",
     "express-async-errors": "^3.1.1",
+    "firebase-admin": "^9.3.0",
     "jsonwebtoken": "^8.5.1",
     "mongoose": "^5.10.13",
     "mongoose-unique-validator": "^2.0.3",
@@ -46,7 +49,7 @@
   },
   "devDependencies": {
     "eslint": "^7.13.0",
-    "eslint-config-airbnb-base": "^14.2.0",
+    "eslint-config-airbnb-base": "^14.2.1",
     "eslint-plugin-import": "^2.22.1",
     "jest": "^26.6.3",
     "nodemon": "^2.0.6",
diff --git a/requests/api/softwares/delete_softwares.rest b/requests/api/softwares/delete_softwareById.rest
similarity index 74%
rename from requests/api/softwares/delete_softwares.rest
rename to requests/api/softwares/delete_softwareById.rest
index fa43706..5bb89a8 100644
--- a/requests/api/softwares/delete_softwares.rest
+++ b/requests/api/softwares/delete_softwareById.rest
@@ -1,2 +1,2 @@
-DELETE http://localhost:3001/api/softwares/5f997876dde20a5a60ce1c64
+DELETE http://localhost:3001/api/software/5f997876dde20a5a60ce1c64
 Authorization: bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6InNhbXBsZSIsImlkIjoiNWY4ZGEzODcwODlmZmY0ZGIwNmJjMGFmIiwiaWF0IjoxNjAzODkzMzExfQ.ARy4EKDMzJqd4DcZyWXP5hygSQ9A2Bw1YfMQ-Nb03JU
\ No newline at end of file
diff --git a/requests/api/softwares/get_software.rest b/requests/api/softwares/get_software.rest
index 26bd5d1..05eea26 100644
--- a/requests/api/softwares/get_software.rest
+++ b/requests/api/softwares/get_software.rest
@@ -1 +1 @@
-GET http://localhost:3001/api/softwares/5f5e01ad5b0c9840c0d7f717
\ No newline at end of file
+GET http://localhost:3001/api/software/
\ No newline at end of file
diff --git a/requests/api/softwares/get_softwareById.rest b/requests/api/softwares/get_softwareById.rest
new file mode 100644
index 0000000..c3f55bf
--- /dev/null
+++ b/requests/api/softwares/get_softwareById.rest
@@ -0,0 +1 @@
+GET http://localhost:3001/api/software/5f5e01ad5b0c9840c0d7f717
\ No newline at end of file
diff --git a/requests/api/softwares/get_softwares.rest b/requests/api/softwares/get_softwares.rest
deleted file mode 100644
index eca92c7..0000000
--- a/requests/api/softwares/get_softwares.rest
+++ /dev/null
@@ -1 +0,0 @@
-GET http://localhost:3001/api/softwares/
\ No newline at end of file
diff --git a/requests/api/softwares/put_softwares.rest b/requests/api/softwares/patch_softwareById.rest
similarity index 80%
rename from requests/api/softwares/put_softwares.rest
rename to requests/api/softwares/patch_softwareById.rest
index af659fe..8dd5822 100644
--- a/requests/api/softwares/put_softwares.rest
+++ b/requests/api/softwares/patch_softwareById.rest
@@ -1,13 +1,11 @@
-PUT http://localhost:3001/api/softwares/5f997876dde20a5a60ce1c64
+PUT http://localhost:3001/api/software/5f997876dde20a5a60ce1c64
 Content-Type: application/json
 Authorization: bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6InNhbXBsZSIsImlkIjoiNWY4ZGEzODcwODlmZmY0ZGIwNmJjMGFmIiwiaWF0IjoxNjAzODkzMzExfQ.ARy4EKDMzJqd4DcZyWXP5hygSQ9A2Bw1YfMQ-Nb03JU
 
 {
     "description": "A sample software made by a happy person love",
     "homePage": "http://apple.com.sg",
-    "platforms": [
-        "Windows", "MacOS"
-    ],
+    "platform": "MacOS",
     "meta": {
         "tags": ["hello", "world"],
         "votes": 1
diff --git a/requests/api/softwares/post_softwares.rest b/requests/api/softwares/post_software.rest
similarity index 81%
rename from requests/api/softwares/post_softwares.rest
rename to requests/api/softwares/post_software.rest
index a3f5a59..eca31cf 100644
--- a/requests/api/softwares/post_softwares.rest
+++ b/requests/api/softwares/post_software.rest
@@ -1,4 +1,4 @@
-POST http://localhost:3001/api/softwares/
+POST http://localhost:3001/api/software/
 Content-Type: application/json
 Authorization: bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6InNhbXBsZSIsImlkIjoiNWY4ZGEzODcwODlmZmY0ZGIwNmJjMGFmIiwiaWF0IjoxNjAzODkzMzExfQ.ARy4EKDMzJqd4DcZyWXP5hygSQ9A2Bw1YfMQ-Nb03JU
 
@@ -6,8 +6,6 @@ Authorization: bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6InNhb
     "name": "SampleSoftware8",
     "description": "A sample software",
     "homePage": "http://example.com",
-    "platforms": [
-        "Windows"
-    ],
+    "platform": "Windows",
     "isActiveDevelopment": true
 }
\ No newline at end of file
diff --git a/requests/api/users/post_users.rest b/requests/api/users/post_users.rest
index 45b2fe4..fb40483 100644
--- a/requests/api/users/post_users.rest
+++ b/requests/api/users/post_users.rest
@@ -1,9 +1,7 @@
 POST http://localhost:3001/api/users/
 Content-Type: application/json
+Authorization: bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6InNhbXBsZSIsImlkIjoiNWY4ZGEzODcwODlmZmY0ZGIwNmJjMGFmIiwiaWF0IjoxNjAzODkzMzExfQ.ARy4EKDMzJqd4DcZyWXP5hygSQ9A2Bw1YfMQ-Nb03JU
 
 {
     "username": "Sample",
-    "name": "SampleName",
-    "email": "sample@example.com",
-    "password": "SamplePassword"
 }
\ No newline at end of file
diff --git a/routes/api/auth.js b/routes/api/auth.js
index c6cc96d..d4ebf50 100644
--- a/routes/api/auth.js
+++ b/routes/api/auth.js
@@ -1,8 +1,9 @@
 const authRouter = require('express').Router();
 const authController = require('../../controllers/api/authController');
+const { disabledAPIEndPoint } = require('../../utils/middleware');
 
-authRouter.post('/', authController.postAuth);
+authRouter.post('/', disabledAPIEndPoint, authController.postAuth);
 
-authRouter.get('/', authController.getAuth);
+authRouter.get('/', disabledAPIEndPoint, authController.getAuth);
 
 module.exports = authRouter;
diff --git a/routes/api/software.js b/routes/api/software.js
new file mode 100644
index 0000000..7e5fdb7
--- /dev/null
+++ b/routes/api/software.js
@@ -0,0 +1,27 @@
+const softwareRouter = require('express').Router();
+const middleware = require('../../utils/middleware');
+const softwareController = require('../../controllers/api/softwareController');
+
+softwareRouter.get('/', softwareController.getSoftware);
+
+softwareRouter.post(
+  '/',
+  middleware.tokenValidation,
+  softwareController.postSoftware,
+);
+
+softwareRouter.patch(
+  '/:id',
+  middleware.tokenValidation,
+  softwareController.patchSoftwareById,
+);
+
+softwareRouter.get('/:id', softwareController.getSoftwareById);
+
+softwareRouter.delete(
+  '/:id',
+  middleware.tokenValidation,
+  softwareController.deleteSoftwareById,
+);
+
+module.exports = softwareRouter;
diff --git a/routes/api/softwares.js b/routes/api/softwares.js
deleted file mode 100644
index 63c15eb..0000000
--- a/routes/api/softwares.js
+++ /dev/null
@@ -1,27 +0,0 @@
-const softwaresRouter = require('express').Router();
-const middleware = require('../../utils/middleware');
-const softwaresControllers = require('../../controllers/api/softwaresController');
-
-softwaresRouter.get('/', softwaresControllers.getSoftwares);
-
-softwaresRouter.post(
-  '/',
-  middleware.tokenValidation,
-  softwaresControllers.postSoftwares,
-);
-
-softwaresRouter.put(
-  '/:id',
-  middleware.tokenValidation,
-  softwaresControllers.putSoftware,
-);
-
-softwaresRouter.get('/:id', softwaresControllers.getSoftware);
-
-softwaresRouter.delete(
-  '/:id',
-  middleware.tokenValidation,
-  softwaresControllers.deleteSoftware,
-);
-
-module.exports = softwaresRouter;
diff --git a/tests/api/auth/auth.test.js b/tests/api/disabledAPINotTested/auth/auth.test.js
similarity index 92%
rename from tests/api/auth/auth.test.js
rename to tests/api/disabledAPINotTested/auth/auth.test.js
index d061dc3..11c3e78 100644
--- a/tests/api/auth/auth.test.js
+++ b/tests/api/disabledAPINotTested/auth/auth.test.js
@@ -1,8 +1,8 @@
 const supertest = require('supertest');
 const mongoose = require('mongoose');
-const app = require('../../../app');
-const databaseSetupTestUtils = require('../../utils/databaseSetup');
-const { initialiseADefaultUserInDb } = require('../../utils/databaseSetup');
+const app = require('../../../../app');
+const databaseSetupTestUtils = require('../../../utils/databaseSetup');
+const { initialiseADefaultUserInDb } = require('../../../utils/databaseSetup');
 
 const api = supertest(app);
 
diff --git a/tests/api/software/softwares.test.js b/tests/api/software.test.js
similarity index 68%
rename from tests/api/software/softwares.test.js
rename to tests/api/software.test.js
index 91c9822..c21ba8e 100644
--- a/tests/api/software/softwares.test.js
+++ b/tests/api/software.test.js
@@ -1,28 +1,34 @@
 const supertest = require('supertest');
 const mongoose = require('mongoose');
-const app = require('../../../app');
-const databaseSetupTestUtils = require('../../utils/databaseSetup');
-const softwareTestUtils = require('../../utils/api/softwaresTestUtils');
+const app = require('../../app');
+const databaseSetup = require('../utils/databaseSetup');
+const usersTestUtils = require('../utils/api/usersTestUtils');
+const softwareTestUtils = require('../utils/api/softwareTestUtils');
+const firebaseTestUtils = require('../utils/firebaseTestUtils');
 
 const api = supertest(app);
 
 let defaultUser;
-let token;
 
 beforeEach(async () => {
-  await databaseSetupTestUtils.resetDatabase();
-  defaultUser = await databaseSetupTestUtils.initialiseADefaultUserInDb();
-  token = databaseSetupTestUtils.loginUserToken(defaultUser);
+  await databaseSetup.resetDatabase();
+  defaultUser = await usersTestUtils.addUserToDb(
+    usersTestUtils.sampleUserCredential1,
+  );
+  await databaseSetup.setBackendIdOfDefaultUser(
+    usersTestUtils.sampleUserCredential1,
+    defaultUser.id,
+  );
 });
 
 describe('Software Controller', () => {
-  describe('GET request to /api/softwares/', () => {
+  describe('GET request to /api/software/', () => {
     test('When there is no software in database, return status code 200 and json with an empty array of softwares', async () => {
-      const initialSoftwaresInDb = await softwareTestUtils.softwaresInDb();
-      expect(initialSoftwaresInDb).toHaveLength(0);
+      const initialSoftwareInDb = await databaseSetup.softwareInDb();
+      expect(initialSoftwareInDb).toHaveLength(0);
 
       const response = await api
-        .get('/api/softwares')
+        .get('/api/software')
         .expect(200)
         .expect('Content-Type', /application\/json/);
 
@@ -38,11 +44,11 @@ describe('Software Controller', () => {
         defaultUser._id,
       );
 
-      const initialSoftwaresInDb = await softwareTestUtils.softwaresInDb();
-      expect(initialSoftwaresInDb).toHaveLength(1);
+      const initialSoftwareInDb = await databaseSetup.softwareInDb();
+      expect(initialSoftwareInDb).toHaveLength(1);
 
       const response = await api
-        .get('/api/softwares')
+        .get('/api/software')
         .expect(200)
         .expect('Content-Type', /application\/json/);
 
@@ -50,7 +56,7 @@ describe('Software Controller', () => {
         ...softwareToAdd,
         // Since the name and platform values are stored in lowercase in the database.
         name: softwareToAdd.name.toLowerCase(),
-        platforms: softwareToAdd.platforms.map((platform) => platform.toLowerCase()),
+        platform: softwareToAdd.platform.toLowerCase(),
         meta: {
           addedByUser: {
             username: defaultUser.username,
@@ -83,11 +89,11 @@ describe('Software Controller', () => {
         defaultUser._id,
       );
 
-      const initialSoftwaresInDb = await softwareTestUtils.softwaresInDb();
-      expect(initialSoftwaresInDb).toHaveLength(2);
+      const initialSoftwareInDb = await databaseSetup.softwareInDb();
+      expect(initialSoftwareInDb).toHaveLength(2);
 
       const response = await api
-        .get('/api/softwares')
+        .get('/api/software')
         .expect(200)
         .expect('Content-Type', /application\/json/);
 
@@ -95,7 +101,7 @@ describe('Software Controller', () => {
         ...softwareToAdd1,
         // Since the name and platform values are stored in lowercase in the database.
         name: softwareToAdd1.name.toLowerCase(),
-        platforms: softwareToAdd1.platforms.map((platform) => platform.toLowerCase()),
+        platform: softwareToAdd1.platform.toLowerCase(),
         meta: {
           addedByUser: {
             username: defaultUser.username,
@@ -112,7 +118,7 @@ describe('Software Controller', () => {
         ...softwareToAdd2,
         // Since the name and platform values are stored in lowercase in the database.
         name: softwareToAdd2.name.toLowerCase(),
-        platforms: softwareToAdd2.platforms.map((platform) => platform.toLowerCase()),
+        platform: softwareToAdd2.platform.toLowerCase(),
         meta: {
           addedByUser: {
             username: defaultUser.username,
@@ -135,9 +141,9 @@ describe('Software Controller', () => {
 });
 
 describe('Software Controller', () => {
-  describe('POST request to /api/softwares/', () => {
-    test('When missing Authorisation token, return with status 401 with json Missing or Invalid Token error message, no change in the number of softwares in database', async () => {
-      const initialSoftwaresInDb = await softwareTestUtils.softwaresInDb();
+  describe('POST request to /api/software/', () => {
+    test('When missing Authorisation token, return with status 401 with json Missing Token error message, no change in the number of softwares in database', async () => {
+      const initialSoftwareInDb = await databaseSetup.softwareInDb();
 
       const softwareToAdd = {
         ...softwareTestUtils.sampleSoftwareInDb1,
@@ -154,18 +160,18 @@ describe('Software Controller', () => {
       };
 
       const response = await api
-        .post('/api/softwares')
+        .post('/api/software/')
         .send(softwareToAdd)
         .expect(401)
         .expect('Content-Type', /application\/json/);
 
-      const softwaresInDb = await softwareTestUtils.softwaresInDb();
-      expect(softwaresInDb).toHaveLength(initialSoftwaresInDb.length);
-      expect(response.body.error).toBe('Missing or Invalid Token');
+      const softwareInDb = await databaseSetup.softwareInDb();
+      expect(softwareInDb).toHaveLength(initialSoftwareInDb.length);
+      expect(response.body.error).toBe('Missing Token');
     });
 
-    test('When invalid Authorisation token, return with status 401 with json Token missing or invalid error message, no change in the number of softwares in database', async () => {
-      const initialSoftwaresInDb = await softwareTestUtils.softwaresInDb();
+    test('When invalid Authorisation token, return with status 401 with json Invalid Token error message, no change in the number of softwares in database', async () => {
+      const initialSoftwareInDb = await databaseSetup.softwareInDb();
 
       const softwareToAdd = {
         ...softwareTestUtils.sampleSoftwareInDb1,
@@ -182,19 +188,25 @@ describe('Software Controller', () => {
       };
 
       const response = await api
-        .post('/api/softwares')
+        .post('/api/software/')
         .set('Authorization', 'bearer invalid token')
         .send(softwareToAdd)
         .expect(401)
         .expect('Content-Type', /application\/json/);
 
-      const softwaresInDb = await softwareTestUtils.softwaresInDb();
-      expect(softwaresInDb).toHaveLength(initialSoftwaresInDb.length);
+      const softwareInDb = await databaseSetup.softwareInDb();
+      expect(softwareInDb).toHaveLength(initialSoftwareInDb.length);
       expect(response.body.error).toBe('Invalid Token');
     });
 
     test('When request is valid, number of softwares in database increments by 1', async () => {
-      const initialSoftwaresInDb = await softwareTestUtils.softwaresInDb();
+      const { email, password } = usersTestUtils.sampleUserCredential1;
+      const { idToken } = await firebaseTestUtils.loginFireBase(
+        email,
+        password,
+      );
+
+      const initialSoftwareInDb = await databaseSetup.softwareInDb();
 
       const softwareToAdd = {
         ...softwareTestUtils.sampleSoftwareInDb1,
@@ -211,8 +223,8 @@ describe('Software Controller', () => {
       };
 
       const response = await api
-        .post('/api/softwares')
-        .set('Authorization', databaseSetupTestUtils.formattedToken(token))
+        .post('/api/software/')
+        .set('Authorization', `bearer ${idToken}`)
         .send(softwareToAdd)
         .expect(201)
         .expect('Content-Type', /application\/json/);
@@ -221,17 +233,17 @@ describe('Software Controller', () => {
         ...softwareToAdd,
         // Since the name and platform values are stored in lowercase in the database.
         name: softwareToAdd.name.toLowerCase(),
-        platforms: softwareToAdd.platforms.map((platform) => platform.toLowerCase()),
+        platform: softwareToAdd.platform.toLowerCase(),
       };
 
-      const softwaresInDb = await softwareTestUtils.softwaresInDb();
-      expect(softwaresInDb).toHaveLength(initialSoftwaresInDb.length + 1);
+      const softwareInDb = await databaseSetup.softwareInDb();
+      expect(softwareInDb).toHaveLength(initialSoftwareInDb.length + 1);
       expect(response.body).toMatchObject(expectedSoftware);
     });
   });
 });
 
 afterAll(async () => {
-  await databaseSetupTestUtils.resetDatabase();
+  await databaseSetup.resetDatabase();
   await mongoose.connection.close();
 });
diff --git a/tests/api/users.test.js b/tests/api/users.test.js
new file mode 100644
index 0000000..738de70
--- /dev/null
+++ b/tests/api/users.test.js
@@ -0,0 +1,268 @@
+const supertest = require('supertest');
+const mongoose = require('mongoose');
+const app = require('../../app');
+const databaseSetup = require('../utils/databaseSetup');
+const usersTestUtils = require('../utils/api/usersTestUtils');
+const firebaseTestUtils = require('../utils/firebaseTestUtils');
+
+const api = supertest(app);
+
+beforeEach(async () => {
+  await databaseSetup.resetDatabase();
+});
+
+describe('Users Controller', () => {
+  describe('GET request to /api/users/', () => {
+    test('When there is no user in database, return status code 200 and json with an empty array of users', async () => {
+      const initialUsersInDb = await databaseSetup.usersInDb();
+      expect(initialUsersInDb).toHaveLength(0);
+
+      const response = await api
+        .get('/api/users')
+        .expect(200)
+        .expect('Content-Type', /application\/json/);
+
+      expect(response.body).toHaveLength(0);
+    });
+
+    test('When there is one user in database, return status code 200 and json with only that user in the array', async () => {
+      const userToAdd = usersTestUtils.sampleUserCredential1;
+      await usersTestUtils.addUserToDb(userToAdd);
+
+      const initialUsersInDb = await databaseSetup.usersInDb();
+      expect(initialUsersInDb).toHaveLength(1);
+
+      const response = await api
+        .get('/api/users')
+        .expect(200)
+        .expect('Content-Type', /application\/json/);
+
+      const expectedUser = usersTestUtils.sanitizeUserObject(
+        usersTestUtils.sampleUserInDb1,
+      );
+
+      expect(response.body).toHaveLength(1);
+      expect(response.body[0]).toMatchObject(expectedUser);
+    });
+
+    test('When there are two users in database, return status code 200 and json with only those two users in the array', async () => {
+      const user1ToAdd = usersTestUtils.sampleUserCredential1;
+      const user2ToAdd = usersTestUtils.sampleUserCredential2;
+      await usersTestUtils.addUserToDb(user1ToAdd);
+      await usersTestUtils.addUserToDb(user2ToAdd);
+
+      const initialUsersInDb = await databaseSetup.usersInDb();
+      expect(initialUsersInDb).toHaveLength(2);
+
+      const response = await api
+        .get('/api/users')
+        .expect(200)
+        .expect('Content-Type', /application\/json/);
+
+      const expectedUser1 = usersTestUtils.sanitizeUserObject(
+        usersTestUtils.sampleUserInDb1,
+      );
+
+      const expectedUser2 = usersTestUtils.sanitizeUserObject(
+        usersTestUtils.sampleUserInDb2,
+      );
+
+      expect(response.body).toHaveLength(2);
+      expect(response.body[0]).toMatchObject(expectedUser1);
+      expect(response.body[1]).toMatchObject(expectedUser2);
+    });
+  });
+
+  /**
+   * Note some test cases for validation which was present in the previous commits
+   * were removed as validation such as email, firebaseUid, etc
+   * are handled by firebase Authentication
+   */
+  describe('POST request to /api/users/', () => {
+    test('(Test one mongodb buildin validator) When username is missing, return json with error missing username message', async () => {
+      const { email, password } = usersTestUtils.sampleUserCredential1;
+      const { idToken } = await firebaseTestUtils.loginFireBase(
+        email,
+        password,
+      );
+
+      const reqBody = {};
+
+      const initialUsersInDb = await databaseSetup.usersInDb();
+
+      const response = await api
+        .post('/api/users/')
+        .set('Authorization', `bearer ${idToken}`)
+        .send(reqBody)
+        .expect(400)
+        .expect('Content-Type', /application\/json/);
+
+      const usersInDb = await databaseSetup.usersInDb();
+
+      expect(usersInDb).toHaveLength(initialUsersInDb.length);
+      expect(response.body.error).toEqual({
+        username: 'Missing username',
+      });
+    });
+
+    test('(Test one mongodb buildin validator) When username is less than 6 characters long , return json with error the username should be at least 6 characters long', async () => {
+      const { email, password } = usersTestUtils.sampleUserCredential1;
+      const { idToken } = await firebaseTestUtils.loginFireBase(
+        email,
+        password,
+      );
+
+      const reqBody = {
+        username: '123',
+      };
+
+      const initialUsersInDb = await databaseSetup.usersInDb();
+
+      const response = await api
+        .post('/api/users/')
+        .set('Authorization', `bearer ${idToken}`)
+        .send(reqBody)
+        .expect(400)
+        .expect('Content-Type', /application\/json/);
+
+      const usersInDb = await databaseSetup.usersInDb();
+
+      expect(usersInDb).toHaveLength(initialUsersInDb.length);
+      expect(response.body.error).toEqual({
+        username: 'The username should be at least 6 characters long',
+      });
+    });
+
+    test('(Test custom validator) When username is containing unsupported characters like spaces, return json with error A valid username is required message', async () => {
+      const { email, password } = usersTestUtils.sampleUserCredential1;
+      const { idToken } = await firebaseTestUtils.loginFireBase(
+        email,
+        password,
+      );
+
+      const reqBody = {
+        username: 'Sample username',
+      };
+
+      const initialUsersInDb = await databaseSetup.usersInDb();
+
+      const response = await api
+        .post('/api/users/')
+        .set('Authorization', `bearer ${idToken}`)
+        .send(reqBody)
+        .expect(400)
+        .expect('Content-Type', /application\/json/);
+
+      const usersInDb = await databaseSetup.usersInDb();
+
+      expect(usersInDb).toHaveLength(initialUsersInDb.length);
+
+      const expectedError = {
+        username: 'A valid username is required',
+      };
+
+      expect(response.body.error).toEqual(expectedError);
+    });
+  });
+
+  test("(Test unique validator) When username ('sample') already exists in database, return json with error username must be unique. message", async () => {
+    const { email, password } = usersTestUtils.sampleUserCredential2;
+    const { idToken } = await firebaseTestUtils.loginFireBase(email, password);
+
+    const reqBody = {
+      username: 'Sample',
+    };
+
+    await usersTestUtils.addUserToDb(usersTestUtils.sampleUserCredential1);
+
+    const initialUsersInDb = await databaseSetup.usersInDb();
+
+    const response = await api
+      .post('/api/users/')
+      .set('Authorization', `bearer ${idToken}`)
+      .send(reqBody)
+      .expect(400)
+      .expect('Content-Type', /application\/json/);
+
+    const usersInDb = await databaseSetup.usersInDb();
+
+    expect(usersInDb).toHaveLength(initialUsersInDb.length);
+
+    const expectedError = {
+      username: 'username must be unique.',
+    };
+
+    expect(response.body.error).toEqual(expectedError);
+  });
+
+  test("(Test multiple unique validators) When email ('sample@example.com') and firebase uid already exists in database, return json with error email must be unique. and firebaseUid must be unique messages", async () => {
+    const { email, password } = usersTestUtils.sampleUserCredential1;
+    const { idToken } = await firebaseTestUtils.loginFireBase(email, password);
+
+    const reqBody = {
+      username: 'Sample2',
+    };
+
+    await usersTestUtils.addUserToDb(usersTestUtils.sampleUserCredential1);
+
+    const initialUsersInDb = await databaseSetup.usersInDb();
+
+    const response = await api
+      .post('/api/users/')
+      .set('Authorization', `bearer ${idToken}`)
+      .send(reqBody)
+      .expect(400)
+      .expect('Content-Type', /application\/json/);
+
+    const usersInDb = await databaseSetup.usersInDb();
+
+    expect(usersInDb).toHaveLength(initialUsersInDb.length);
+
+    const expectedContainedError = {
+      email: 'email must be unique.',
+      firebaseUid: 'firebaseUid must be unique.',
+    };
+
+    expect(response.body.error).toEqual(expectedContainedError);
+  });
+
+  test('When request is valid, number of users in database increment by 1', async () => {
+    const { email, password } = usersTestUtils.sampleUserCredential1;
+    const { idToken, uid } = await firebaseTestUtils.loginFireBase(
+      email,
+      password,
+    );
+
+    const reqBody = {
+      username: 'Sample',
+    };
+
+    const initialUsersInDb = await databaseSetup.usersInDb();
+
+    const response = await api
+      .post('/api/users/')
+      .send(reqBody)
+      .set('Authorization', `bearer ${idToken}`)
+      .expect(201)
+      .expect('Content-Type', /application\/json/);
+
+    const usersInDb = await databaseSetup.usersInDb();
+    expect(usersInDb).toHaveLength(initialUsersInDb.length + 1);
+
+    // Lowercase as the username and email fields
+    // are converted to lowercase before inserting into database.
+    const expectedUser = {
+      username: 'sample',
+      name: 'SampleName',
+      email: 'sample@example.com',
+      firebaseUid: uid,
+    };
+
+    expect(response.body).toMatchObject(expectedUser);
+  });
+});
+
+afterAll(async () => {
+  await databaseSetup.resetDatabase();
+  await mongoose.connection.close();
+});
diff --git a/tests/api/users/users.test.js b/tests/api/users/users.test.js
deleted file mode 100644
index bc2dc3c..0000000
--- a/tests/api/users/users.test.js
+++ /dev/null
@@ -1,312 +0,0 @@
-const supertest = require('supertest');
-const mongoose = require('mongoose');
-const app = require('../../../app');
-const databaseSetupTestUtils = require('../../utils/databaseSetup');
-const usersTestUtils = require('../../utils/api/usersTestUtils');
-
-const api = supertest(app);
-
-beforeEach(async () => {
-  await databaseSetupTestUtils.resetDatabase();
-});
-
-describe('Users Controller', () => {
-  describe('GET request to /api/users/', () => {
-    test('When there is no user in database, return status code 200 and json with an empty array of users', async () => {
-      const initialUsersInDb = await usersTestUtils.usersInDb();
-      expect(initialUsersInDb).toHaveLength(0);
-
-      const response = await api
-        .get('/api/users')
-        .expect(200)
-        .expect('Content-Type', /application\/json/);
-
-      expect(response.body).toHaveLength(0);
-    });
-
-    test('When there is one user in database, return status code 200 and json with only that user in the array', async () => {
-      const userToAdd = usersTestUtils.sampleUserInDb1;
-      await usersTestUtils.addUserToDb(userToAdd);
-
-      const initialUsersInDb = await usersTestUtils.usersInDb();
-      expect(initialUsersInDb).toHaveLength(1);
-
-      const response = await api
-        .get('/api/users')
-        .expect(200)
-        .expect('Content-Type', /application\/json/);
-
-      const expectedUser = usersTestUtils.sanitizeUserObject(userToAdd);
-
-      expect(response.body).toHaveLength(1);
-      expect(response.body[0]).toMatchObject(expectedUser);
-    });
-
-    test('When there are two users in database, return status code 200 and json with only those two users in the array', async () => {
-      const user1ToAdd = usersTestUtils.sampleUserInDb1;
-      const user2ToAdd = usersTestUtils.sampleUserInDb2;
-      await usersTestUtils.addUserToDb(user1ToAdd);
-      await usersTestUtils.addUserToDb(user2ToAdd);
-
-      const initialUsersInDb = await usersTestUtils.usersInDb();
-      expect(initialUsersInDb).toHaveLength(2);
-
-      const response = await api
-        .get('/api/users')
-        .expect(200)
-        .expect('Content-Type', /application\/json/);
-
-      const expectedUser1 = usersTestUtils.sanitizeUserObject(user1ToAdd);
-      const expectedUser2 = usersTestUtils.sanitizeUserObject(user2ToAdd);
-
-      expect(response.body).toHaveLength(2);
-      expect(response.body[0]).toMatchObject(expectedUser1);
-      expect(response.body[1]).toMatchObject(expectedUser2);
-    });
-  });
-
-  describe('POST request to /api/users/', () => {
-    test('(Test one mongodb buildin validator) When username is missing, return json with error missing username message', async () => {
-      const userToAdd = {
-        name: 'SampleName',
-        email: 'sample@example.com',
-        password: 'SamplePassword',
-      };
-
-      const initialUsersInDb = await usersTestUtils.usersInDb();
-
-      const response = await api
-        .post('/api/users/')
-        .send(userToAdd)
-        .expect(400)
-        .expect('Content-Type', /application\/json/);
-
-      const usersInDb = await usersTestUtils.usersInDb();
-
-      expect(usersInDb).toHaveLength(initialUsersInDb.length);
-      expect(response.body.error).toEqual({
-        username: 'Missing username',
-      });
-    });
-
-    test('(Test custom validator) When username is containing unsupported characters like spaces, return json with error A valid username is required message', async () => {
-      const userToAdd = {
-        username: 'Sample username',
-        name: 'SampleName',
-        email: 'sample@example.com',
-        password: 'SamplePassword',
-      };
-
-      const initialUsersInDb = await usersTestUtils.usersInDb();
-
-      const response = await api
-        .post('/api/users/')
-        .send(userToAdd)
-        .expect(400)
-        .expect('Content-Type', /application\/json/);
-
-      const usersInDb = await usersTestUtils.usersInDb();
-
-      expect(usersInDb).toHaveLength(initialUsersInDb.length);
-
-      const expectedError = {
-        username: 'A valid username is required',
-      };
-
-      expect(response.body.error).toEqual(expectedError);
-    });
-
-    test('(Test custom validator) When email is invalid, return json with error A valid email address is required message', async () => {
-      const userToAdd = {
-        username: 'Sample',
-        name: 'SampleName',
-        email: 'sample@.com',
-        password: 'SamplePassword',
-      };
-
-      const initialUsersInDb = await usersTestUtils.usersInDb();
-
-      const response = await api
-        .post('/api/users/')
-        .send(userToAdd)
-        .expect(400)
-        .expect('Content-Type', /application\/json/);
-
-      const usersInDb = await usersTestUtils.usersInDb();
-
-      expect(usersInDb).toHaveLength(initialUsersInDb.length);
-
-      const expectedError = {
-        email: 'A valid email address is required',
-      };
-
-      expect(response.body.error).toEqual(expectedError);
-    });
-
-    test('(Test more than one custom validator violations) When username is containing unsupported characters like spaces and email address is invalid, return json with error A valid username is required message and a valid email address is required message', async () => {
-      const userToAdd = {
-        username: 'Sample username',
-        name: 'SampleName',
-        email: 'sample@.com',
-        password: 'SamplePassword',
-      };
-
-      const initialUsersInDb = await usersTestUtils.usersInDb();
-
-      const response = await api
-        .post('/api/users/')
-        .send(userToAdd)
-        .expect(400)
-        .expect('Content-Type', /application\/json/);
-
-      const usersInDb = await usersTestUtils.usersInDb();
-
-      expect(usersInDb).toHaveLength(initialUsersInDb.length);
-
-      const expectedError = {
-        username: 'A valid username is required',
-        email: 'A valid email address is required',
-      };
-
-      expect(response.body.error).toEqual(expectedError);
-    });
-
-    test("(Test unique validator) When username ('sample') already exists in database, return json with error username must be unique. message", async () => {
-      const userToAdd = {
-        username: 'Sample',
-        name: 'SampleName2',
-        email: 'sample2@example.com',
-        password: 'SamplePassword2',
-      };
-
-      await usersTestUtils.addUserToDb(usersTestUtils.sampleUserInDb1);
-
-      const initialUsersInDb = await usersTestUtils.usersInDb();
-
-      const response = await api
-        .post('/api/users/')
-        .send(userToAdd)
-        .expect(400)
-        .expect('Content-Type', /application\/json/);
-
-      const usersInDb = await usersTestUtils.usersInDb();
-
-      expect(usersInDb).toHaveLength(initialUsersInDb.length);
-
-      const expectedError = {
-        username: 'username must be unique.',
-      };
-
-      expect(response.body.error).toEqual(expectedError);
-    });
-
-    test("(Test unique validator) When username ('sample@example.com') already exists in database, return json with error email must be unique. message", async () => {
-      const userToAdd = {
-        username: 'Sample2',
-        name: 'SampleName2',
-        email: 'sample@example.com',
-        password: 'SamplePassword2',
-      };
-
-      await usersTestUtils.addUserToDb(usersTestUtils.sampleUserInDb1);
-
-      const initialUsersInDb = await usersTestUtils.usersInDb();
-
-      const response = await api
-        .post('/api/users/')
-        .send(userToAdd)
-        .expect(400)
-        .expect('Content-Type', /application\/json/);
-
-      const usersInDb = await usersTestUtils.usersInDb();
-
-      expect(usersInDb).toHaveLength(initialUsersInDb.length);
-
-      const expectedError = {
-        email: 'email must be unique.',
-      };
-
-      expect(response.body.error).toEqual(expectedError);
-    });
-
-    test('When password is missing, return json with error `password` is required message', async () => {
-      const userToAdd = {
-        username: 'Sample',
-        name: 'SampleName',
-        email: 'sample@example.com',
-      };
-
-      const initialUsersInDb = await usersTestUtils.usersInDb();
-
-      const response = await api
-        .post('/api/users/')
-        .send(userToAdd)
-        .expect(400)
-        .expect('Content-Type', /application\/json/);
-
-      const usersInDb = await usersTestUtils.usersInDb();
-
-      expect(usersInDb).toHaveLength(initialUsersInDb.length);
-      expect(response.body.error).toBe('`password` is required.');
-    });
-
-    test('When password is less than 8 characters long, return json with error Password has to be at least 8 characters long message', async () => {
-      const userToAdd = {
-        username: 'Sample',
-        name: 'SampleName',
-        email: 'sample@example.com',
-        password: '123456',
-      };
-
-      const initialUsersInDb = await usersTestUtils.usersInDb();
-
-      const response = await api
-        .post('/api/users/')
-        .send(userToAdd)
-        .expect(400)
-        .expect('Content-Type', /application\/json/);
-
-      const usersInDb = await usersTestUtils.usersInDb();
-
-      expect(usersInDb).toHaveLength(initialUsersInDb.length);
-      expect(response.body.error).toBe(
-        'Password has to be at least 8 characters long.',
-      );
-    });
-
-    test('When request is valid, number of users in database increment by 1', async () => {
-      const userToAdd = {
-        username: 'Sample',
-        name: 'SampleName',
-        email: 'sample@example.com',
-        password: 'SamplePassword',
-      };
-
-      const initialUsersInDb = await usersTestUtils.usersInDb();
-
-      const response = await api
-        .post('/api/users/')
-        .send(userToAdd)
-        .expect(201)
-        .expect('Content-Type', /application\/json/);
-
-      const usersInDb = await usersTestUtils.usersInDb();
-      expect(usersInDb).toHaveLength(initialUsersInDb.length + 1);
-
-      // Lowercase as the username and email fields
-      // are converted to lowercase before inserting into database.
-      const expectedUser = {
-        username: 'sample',
-        name: 'SampleName',
-        email: 'sample@example.com',
-      };
-
-      expect(response.body).toMatchObject(expectedUser);
-    });
-  });
-});
-
-afterAll(async () => {
-  await databaseSetupTestUtils.resetDatabase();
-  await mongoose.connection.close();
-});
diff --git a/tests/utils/api/softwaresTestUtils.js b/tests/utils/api/softwareTestUtils.js
similarity index 80%
rename from tests/utils/api/softwaresTestUtils.js
rename to tests/utils/api/softwareTestUtils.js
index f20aad9..e69f9dc 100644
--- a/tests/utils/api/softwaresTestUtils.js
+++ b/tests/utils/api/softwareTestUtils.js
@@ -4,7 +4,7 @@ const sampleSoftwareInDb1 = {
   name: 'SampleSoftware',
   description: 'A sample software 1',
   homePage: 'http://example.com',
-  platforms: ['Windows'],
+  platform: 'Windows',
   isActiveDevelopment: true,
 };
 
@@ -12,7 +12,7 @@ const sampleSoftwareInDb2 = {
   name: 'SampleSoftware2',
   description: 'A sample software 1',
   homePage: 'http://apple.com',
-  platforms: ['MacOS'],
+  platform: 'MacOS',
   isActiveDevelopment: false,
 };
 
@@ -27,13 +27,13 @@ const addSoftwareToDb = async (softwareObject, addedByUser, updatedByUser) => {
   await softwareToAdd.save();
 };
 
-const softwaresInDb = async () => {
-  const softwares = await Software.find({});
-  return softwares;
+const softwareInDb = async () => {
+  const software = await Software.find({});
+  return software;
 };
 
 module.exports = {
-  softwaresInDb,
+  softwareInDb,
   addSoftwareToDb,
   sampleSoftwareInDb1,
   sampleSoftwareInDb2,
diff --git a/tests/utils/api/usersTestUtils.js b/tests/utils/api/usersTestUtils.js
index be89d5e..5798a3f 100644
--- a/tests/utils/api/usersTestUtils.js
+++ b/tests/utils/api/usersTestUtils.js
@@ -1,33 +1,46 @@
 const User = require('../../../models/user');
-
-const usersInDb = async () => {
-  const users = await User.find({});
-  return users;
-};
+const { loginFireBase } = require('../firebaseTestUtils');
 
 const sampleUserInDb1 = {
   username: 'Sample',
   name: 'SampleName',
   email: 'sample@example.com',
-  passwordHash: 'SamplePasswordHash',
+};
+
+const sampleUserCredential1 = {
+  ...sampleUserInDb1,
+  password: 'SamplePassword',
 };
 
 const sampleUserInDb2 = {
   username: 'Sample2',
   name: 'SampleName2',
   email: 'sample2@example.com',
-  passwordHash: 'SamplePasswordHash2',
 };
 
-const addUserToDb = async (userObject) => {
-  const userToAdd = new User(userObject);
+const sampleUserCredential2 = {
+  ...sampleUserInDb2,
+  password: 'SamplePassword2',
+};
+
+const addUserToDb = async (userCredential) => {
+  const { email, password } = userCredential;
+
+  const withFirebaseId = {
+    ...userCredential,
+    firebaseUid: (await loginFireBase(email, password)).uid,
+  };
+  delete withFirebaseId.password;
+
+  const userToAdd = new User(withFirebaseId);
   const response = await userToAdd.save();
   return response;
 };
 
 /**
- * Santize user object for expected comparison with user object returned from database.
- * In other words, passwordHash is removed and the username and email address are lowercase.
+ * Santizes user object for expected comparison
+ * with user object returned from database (for testing purposes).
+ * In other words, the username and email address are lowercase.
  * @param {Object} userObject
  */
 const sanitizeUserObject = (userObject) => {
@@ -35,8 +48,6 @@ const sanitizeUserObject = (userObject) => {
     ...userObject,
   };
 
-  delete expectedUserObject.passwordHash;
-
   // As the username and email are stored in lowercase when inserting to database.
   expectedUserObject.username = expectedUserObject.username.toLowerCase();
   expectedUserObject.email = expectedUserObject.email.toLowerCase();
@@ -46,8 +57,9 @@ const sanitizeUserObject = (userObject) => {
 
 module.exports = {
   sampleUserInDb1,
+  sampleUserCredential1,
   sampleUserInDb2,
+  sampleUserCredential2,
   addUserToDb,
   sanitizeUserObject,
-  usersInDb,
 };
diff --git a/tests/utils/databaseSetup.js b/tests/utils/databaseSetup.js
index d746e0c..4ad98d0 100644
--- a/tests/utils/databaseSetup.js
+++ b/tests/utils/databaseSetup.js
@@ -1,47 +1,34 @@
-const bcrypt = require('bcrypt');
-const jwt = require('jsonwebtoken');
 const User = require('../../models/user');
 const Software = require('../../models/software');
-const config = require('../../utils/config');
-const usersTestUtils = require('./api/usersTestUtils');
+const firebaseTestUtils = require('./firebaseTestUtils');
+const firebaseAdmin = require('../../utils/firebaseConfig');
 
 const resetDatabase = async () => {
   await User.deleteMany({});
   await Software.deleteMany({});
 };
 
-const initialiseADefaultUserInDb = async () => {
-  const saltRounds = config.BCRYPT_SALT_ROUNDS;
-  const passwordHash = await bcrypt.hash('SamplePassword', saltRounds);
-
-  const userToAdd = {
-    username: 'Sample',
-    name: 'SampleName',
-    email: 'sample@example.com',
-    passwordHash,
-  };
-
-  const defaultUser = await usersTestUtils.addUserToDb(userToAdd);
-
-  return defaultUser;
+const usersInDb = async () => {
+  const users = await User.find({});
+  return users;
 };
 
-const loginUserToken = (testUser) => {
-  const userForToken = {
-    username: testUser.username,
-    id: testUser._id,
-  };
+const softwareInDb = async () => {
+  const software = await Software.find({});
+  return software;
+};
 
-  const token = jwt.sign(userForToken, config.JWT_SECRET);
+const setBackendIdOfDefaultUser = async (userCredential, backendId) => {
+  const { email, password } = userCredential;
+  const { uid } = await firebaseTestUtils.loginFireBase(email, password);
 
-  return token;
+  // Set custom claim with backend user id (different from firebase user id)
+  await firebaseAdmin.auth().setCustomUserClaims(uid, { backendId });
 };
 
-const formattedToken = (token) => `bearer ${token}`;
-
 module.exports = {
   resetDatabase,
-  initialiseADefaultUserInDb,
-  loginUserToken,
-  formattedToken,
+  usersInDb,
+  softwareInDb,
+  setBackendIdOfDefaultUser,
 };
diff --git a/tests/utils/firebaseTestUtils.js b/tests/utils/firebaseTestUtils.js
new file mode 100644
index 0000000..6b7cc6d
--- /dev/null
+++ b/tests/utils/firebaseTestUtils.js
@@ -0,0 +1,18 @@
+const axios = require('axios');
+const config = require('../../utils/config');
+
+const loginFireBase = async (email, password) => {
+  const response = await axios.post(
+    `https://identitytoolkit.googleapis.com/v1/accounts:signInWithPassword?key=${config.TEST_FIREBASE_CLIENT_API_KEY}`,
+    { email, password, returnSecureToken: true },
+  );
+
+  return {
+    idToken: response.data.idToken,
+    uid: response.data.localId,
+  };
+};
+
+module.exports = {
+  loginFireBase,
+};
diff --git a/utils/config.js b/utils/config.js
index b7ce73d..5350627 100644
--- a/utils/config.js
+++ b/utils/config.js
@@ -8,13 +8,11 @@ const NODE_ENVIRONMENT = process.env.NODE_ENV;
 const MONGODB_URI = NODE_ENVIRONMENT === 'test'
   ? process.env.TEST_MONGODB_URI
   : process.env.MONGODB_URI;
-const BCRYPT_SALT_ROUNDS = Number(process.env.BCRYPT_SALT_ROUNDS);
-const { JWT_SECRET } = process.env;
+const { TEST_FIREBASE_CLIENT_API_KEY } = process.env;
 
 module.exports = {
   PORT,
   NODE_ENVIRONMENT,
   MONGODB_URI,
-  BCRYPT_SALT_ROUNDS,
-  JWT_SECRET,
+  TEST_FIREBASE_CLIENT_API_KEY,
 };
diff --git a/utils/firebaseConfig.js b/utils/firebaseConfig.js
new file mode 100644
index 0000000..0828e2c
--- /dev/null
+++ b/utils/firebaseConfig.js
@@ -0,0 +1,13 @@
+/**
+ * Handles firebase configuration and implementation
+ */
+
+require('dotenv').config();
+const firebaseAdmin = require('firebase-admin');
+
+firebaseAdmin.initializeApp({
+  credential: firebaseAdmin.credential.applicationDefault(),
+  databaseURL: 'https://auth-impl-dev.firebaseio.com',
+});
+
+module.exports = firebaseAdmin;
diff --git a/utils/jwtUtils.js b/utils/jwtUtils.js
index 557aeb1..76d48e8 100644
--- a/utils/jwtUtils.js
+++ b/utils/jwtUtils.js
@@ -1,5 +1,4 @@
-const jwt = require('jsonwebtoken');
-const config = require('./config');
+const firebaseAdmin = require('./firebaseConfig');
 const User = require('../models/user');
 
 const getReqAuthToken = (req) => {
@@ -13,18 +12,29 @@ const getReqAuthToken = (req) => {
 };
 
 /**
- * Verify the input jwt token.
+ * Verify the input jwt Authorisation bearer token.
  * Returns null if invalid/missing token or the user id in the payload is not found in database.
- * If the token is valid and the user id is valid, returns the decoded token.
- * @param {String} authToken The jwt user token
+ * If checkDatabase parameter is set to true, there is
+ * additional check whether the firebase user id is in database.
+ * @param {String} authToken The jwt Authorisation bearer token
+ * @param {Boolean} checkDatabase Whether to check database if
+ * the firebase user id is present in the database.
  */
-const verifyAuthToken = async (authToken) => {
-  const decodedAuthToken = !authToken
-    ? null
-    : jwt.verify(authToken, config.JWT_SECRET);
+const verifyAuthToken = async (authToken, checkDatabase) => {
+  // Return null, it is missing token
+  if (!authToken) {
+    return null;
+  }
+
+  const decodedAuthToken = await firebaseAdmin
+    .auth()
+    .verifyIdToken(authToken, true);
+
+  const user = await User.findOne({ firebaseUid: decodedAuthToken.uid });
 
-  // Return null, it is an invalid token or the user id is not found in database.
-  if (!authToken || !(await User.findById(decodedAuthToken.id))) {
+  // If the checkDatabase parameter is set to true
+  // and the user id is not found in database, return null.
+  if (checkDatabase && !user) {
     return null;
   }
 
diff --git a/utils/middleware.js b/utils/middleware.js
index e04c340..2a961d4 100644
--- a/utils/middleware.js
+++ b/utils/middleware.js
@@ -14,18 +14,31 @@ const { getReqAuthToken, verifyAuthToken } = require('./jwtUtils');
  * @param {Function} next Function which can be called to pass controls to the next handler
  */
 const tokenValidation = async (req, res, next) => {
-  const token = getReqAuthToken(req);
-  const decodedToken = await verifyAuthToken(token);
+  try {
+    const token = getReqAuthToken(req);
 
-  if (!decodedToken) {
+    const decodedToken = await verifyAuthToken(token, true);
+
+    if (!decodedToken) {
+      return res.status(401).json({
+        error: 'Missing Token',
+      });
+    }
+
+    req.body.decodedToken = decodedToken;
+
+    next();
+  } catch (err) {
+    let error = null;
+    if (err.code === 'auth/id-token-revoked') {
+      error = 'Token has been revoked. Please reauthenticate.';
+    } else {
+      error = 'Invalid Token';
+    }
     return res.status(401).json({
-      error: 'Missing or Invalid Token',
+      error,
     });
   }
-
-  req.body.decodedToken = decodedToken;
-
-  next();
 };
 
 const unknownEndPoint = (req, res) => {
@@ -34,6 +47,12 @@ const unknownEndPoint = (req, res) => {
   });
 };
 
+const disabledAPIEndPoint = (req, res) => {
+  res.status(403).json({
+    error: 'API endpoint disabled',
+  });
+};
+
 const errorHandler = (error, req, res, next) => {
   if (error.name === 'ValidationError') {
     const errorObject = {};
@@ -42,11 +61,7 @@ const errorHandler = (error, req, res, next) => {
     });
     return res.status(400).json({ error: errorObject });
   }
-  if (error.name === 'JsonWebTokenError') {
-    return res.status(401).json({
-      error: 'Invalid Token',
-    });
-  }
+
   if (error.name === 'CastError') {
     return res.status(400).json({
       error: 'Malformatted id',
@@ -61,4 +76,5 @@ module.exports = {
   unknownEndPoint,
   errorHandler,
   tokenValidation,
+  disabledAPIEndPoint,
 };