The following actions uses Node.js version which is deprecated and will be forced to run on node20: google-github-actions/auth@v1, actions/download-artifact@v3, google-github-actions/deploy-appengine@v1. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

The "create_credentials_file" option is true, but the current GitHub workspace is empty. Did you forget to use "actions/checkout" before this step? If you do not intend to share authentication with future steps in this job, set "create_credentials_file" to false.