Add get_access_token.yml for getting an access token from the primer App

.github/workflows/get_access_token.yml

@@ -0,0 +1,17 @@
+# Use the primer GitHub App for authentication.
+# See: https://github.com/organizations/primer/settings/apps/primer
+
+name: Get an access token from the primer App
+
+jobs:
+  get-access-token:
+    name: Get access token
+    runs-on: ubuntu-latest
+    steps:
+      - uses: camertron/github-app-installation-auth-action@v1
+        with:
+          app-id: ${{ vars.PRIMER_APP_ID_SHARED }}
+          private-key: ${{ secrets.PRIMER_APP_PRIVATE_KEY_SHARED }}
+          client-id: ${{ vars.PRIMER_APP_CLIENT_ID_SHARED }}
+          client-secret: ${{ secrets.PRIMER_APP_CLIENT_SECRET_SHARED }}
+          installation-id: ${{ vars.PRIMER_APP_INSTALLATION_ID_SHARED }}