This question already asked but I did not find any satisfactory answer.
I followed each and every step of https://developers.google.com/+/mobile/android/samples/quickstart-android#credentials-screenshot but instead of their package name I am using mine.
There are two cases one is direct testing and one after signin the apk with keystore.
When I am testing my app in that case signin with any google account working fine but after I generate my signed apk
it is giving me Error signing in the specified account. Please choose a different account
.
If everything is same then why it is not working with signed apk
?