flutterfire_ui authentication unknown error

Question

I receive An error occurred while calling method Auth#signInWithCredential, errorOrNil => (null) with implementation of flutterfire_ui (0.3.1) on iOS. Does anyone know what the reason for that?

No issue on Android tho

Answer 1

For Android and Google signin, whilst debugging, we need to add a debug certificate fingerprint.

So, updating the SHA fingerprints of the corresponding app in Firebase solved the issue.

For release, I copied them from the Google Play Console as described here. It also shows how to find the debug certificate fingerprint.