Google Sign In error 12500

Check if SHA-1 fingerprints are added to the firebase project settings. If not,find SHA-1 fingerprint using

https://developers.google.com/android/guides/client-auth

Also, find the SHA-1 fingerprint of release key using

keytool -list -v -keystore <keystore path>

Remove <keystore path> with the path of the key store.

Then add both SHA-1 fingerprints to firebase projects settings.

NB: Don't forget to replace google-services.json with updated google-services.json with new fingerprints. I lost two days on that.

While debug

Android studio automatically generate ~/.android/debug.keystore on first debug build and use it to sign the app.

To get the SHA-1 run (password android) (doc):

keytool -exportcert -list -v -alias androiddebugkey -keystore ~/.android/debug.keystore

This SHA-1 should be added to the app settings at firebase to allow usage of google sign in capabilities while testing debug build.

Error PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 12500: , null)

This 12500 Error can be solved by adding a support email address to your project in project settings. Open link https://console.firebase.google.com/

Select Your project and open settings tab.

Provide a valid support email and restart your application now.

Support email and also all project and privacy links are necessary for Google SignIn to work, otherwise it throws 12500.

Set it on https://console.developers.google.com/apis/credentials on the bottom of second tab named "OAuth consent screen" - there you'll find three links that need to be configured.

This is not mentioned ANYWHERE in the Firebase guides.

for error 12500 You need to add support gmail in settings of firebase only and for error 10 add ssh fingerprint in firebase console as you see in picture