[Refactor] Refactoring Auth

[hermannleboss]

Description

Close #261

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Describe the solution you'd like

• Process of authentication

Get the user nonce: /api/user/nonce/{address}
Sign and return to /api/auth/siwe
And SIWE should return a token
Use the token to authenticate the user /api/user/{address}
And you get the user informations
Then redirection to home page

• Expected user Story
  When the user is not authenticated
  Then the value the user should be:

{
  "user": null,
  "userIsAuth": false,
  "authToken": null
}

When the user is authenticated
Then the value the user should be

{
  "user": {
    "address": "0x...",
     //...
  },
  "userIsAuth": true,
  "authToken": "[token]"
}

When the user is authenticated and go to the login page
Then the user should be redirected to the home page

When the user is not authenticated and go to another page than the login page
Then the user should be redirected to the login page

When the user is authenticated and have and 401 error
Then the user should be logout then redirected to the login page

When the logout app is called
Then the value the user should be set to

{
  "user": null,
  "userIsAuth": false,
  "authToken": null
}

When the user sign in
Then the value of the user should be set to

{
  "user": {
    "address": "0x...",
      //...
  },
  "userIsAuth": true,
  "authToken": "[token]"
}

How to know if the user is authenticated

When the auth token is not null or the fetch do not return a 401 error.
Then the app consider the user as authenticated

When the auth token is null or the fetch return a 401 error.
Then the app consider the user as not authenticated
And the user should be logedout

Acceptance Criteria

• All User stories pass

Tasks

Beta Give feedback

1. [Bug]: Blank page when metamask is not installed #268
   +0
2. [Bug] Auth token doesn't update #261
   +0