Starting in April 2023, values for CLIENT_ID and REVERSE_CLIENT_ID are only added to the Firebase config file when Google sign-in is enabled in the project. If the config file was downloaded before April 2023, then these values are present regardless of the enablement of Google sign-in.
Enable Google Sign-In for your Firebase project
To allow users to sign in using Google Sign-In, you must first enable the Google Sign-In provider for your Firebase project:
- In the Firebase console, open the Authentication section.
- On the Sign in method tab, enable the Google provider.
- Click Save.
- Reload download file GoogleService-Info.plist for iOS or google-service.json for Android