Google sign in is not working after signing Apk

I have signed my Apk using Android Studio but after signing Google auth using Firebase is not working in app but before app signing everything is working fine. I am unable to get what is wrong here; I am running app in Android Studio and it's working fine in emulator.

Solution

The problem is all I need to link my app signing SHA-1 certificate to firebase project.In Google play console after heading to Release management -> App signing for there copy App signing SHA-1 certificate and paste it in firebase project settings.It worked fine for me.

THANKS

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