fix: optional pass in app id and private key

action.yml

@@ -1,3 +1,4 @@
+# ubiquity/cloudflare-deploy-action/main/action.yml
 name: "Continuous Deployment to Cloudflare Pages"
 description: "Deploy to Cloudflare Pages"
 
@@ -32,22 +33,29 @@ inputs:
   statics_directory:
     description: "Directory that contains static files"
     required: false
+  app_id:
+    description: "GitHub App ID"
+    required: false
+  private_key:
+    description: "GitHub App Private Key"
+    required: false
 
 runs:
   using: "composite"
   steps:
     - name: Get GitHub App token
+      if: inputs.app_id != '' && inputs.private_key != '' # Only attempt to authenticate if `app_id` and `private_key` are provided
       uses: tibdex/github-app-token@v1.7.0
       id: get_installation_token
       with:
-        app_id: ${{ secrets.APP_ID }}
-        private_key: ${{ secrets.APP_PRIVATE_KEY }}
+        app_id: ${{ inputs.app_id }}
+        private_key: ${{ inputs.private_key }}
 
     - name: Find associated pull request
       id: pr
       uses: actions/github-script@v7
       with:
-        github-token: ${{ steps.get_installation_token.outputs.token }}
+        github-token: ${{ steps.get_installation_token.outputs.token || github.token }}
         script: |
           const response = await github.rest.search.issuesAndPullRequests({
             q: 'repo:${{ inputs.repository }} is:pr sha:${{ inputs.commit_sha }}',
@@ -92,4 +100,4 @@ runs:
         --deployment_output "${{ env.DEPLOYMENT_OUTPUT }}" \
         --repository "${{ inputs.repository }}" \
         --pull_request_number "${{ fromJSON(steps.pr.outputs.result).pullRequestNumber }}" \
-        --commit_sha "${{ inputs.commit_sha }}"
+        --commit_sha "${{ inputs.commit_sha }}"