firebase - Google sign in doesn't work after release of flutter app

Question

I developed a app with Flutter and tested on my device using the command:

flutter run --release

and everything worked fine. I also tried building the app with:

flutter build apk --release

and installing it manually, and still everything was ok.
I uploaded on the store, and now the login doesn't work anymore. I tried looking at the logcat and the error i get when i try to login is:

I/flutter: exception: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 12500: , null)

I tried adding the appCompat dependency and I checked the the SHA1 keys, everything is in the right place, I can't figure out why when I download if from the store it doesn't work anymore.

Answer 1

Waitting for answers