Google Sign in Error
Recently I was really in trouble with flutter google sigin plugin. Although all the settings are correct, the following error appears when I select the account from the list of Google user accounts.
PlatformException (signin_failed, com.google.android.gms.common.api.ApiException: 12500 :, null)
After spending some time and with the amazing community of keyquery, we overcome the problem.
How to troubleshoot the login problem
Go to (https://console.developers.google.com/apis/credentials)
Select your project in the list (top left).
and then go to "Oauth consent screen" the second in the top menu.
If you want to access other Google services, you need to add scope and must put real links.
Once you have done this, you must submit it to Google for approval.