Google Login issue
Test environment
Unity 2019.f
Android
Login failure code
10 : Certificate thumbprint or webclient ID mismatch
The app certificate SHA registered in the Firebase project must match the built apk certificate
Check WebClient ID in Google Console API
If the error code 10
appears when trying to Google Login, you need to check whether the certificate fingerprint is registered in the firebase console.
Register the SHA-1 certificate thumbprint of each app signing key certificate and upload key certificate in Google Play Console App Settings > App Integrity tab in Firebase Console > Project settings > General tab.
To enable Google login for both the version released on the Google Play Console and the version directly distributed by the developer with the same certificate, you must register both the upload key certificate and the app signing certificate fingerprint.
12500 : Firebase Console > Project Setting > General > Set support email
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