docs: update docs

README.md

@@ -13,12 +13,40 @@ conditions.
 
 **Required**: The GitHub token.
 
+This github actions will retrieve members in the organization, so please give
+the github token the appropriate permissions.
+
 ## Usage
 
+This is an example: github apps is used to retrieve the token. See here for
+[details](https://docs.github.com/en/apps/creating-github-apps/authenticating-with-a-github-app/making-authenticated-api-requests-with-a-github-app-in-a-github-actions-workflow).
+
 ```yaml
-- name: Check Approvals
-  uses: hayawata3626/[email protected]
-  with:
-    conditions: '[{"team": "team1", "minimumCount": 1}]'
-    github-token: ${{ secrets.GITHUB_TOKEN }}
+name: Check Team Approvals
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  check-team-approvals:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Generate a token
+        id: generate_token
+        uses: tibdex/github-app-token@v1
+        with:
+          app_id: ${{ secrets.APP_ID }}
+          private_key: ${{ secrets.PRIVATE_KEY }}
+
+      - name: Run approval check
+        uses: hayawata3626/[email protected]
+        with:
+          conditions:
+            '[{"team": "team1", "minimumCount": 3}, {"team": "team2",
+            "minimumCount": 2}]'
+          github-token: ${{ steps.generate_token.outputs.token }}
 ```