Login error with Google firebase

I'm new to Android programming and would be grateful if you could help me. I made an app that uses login with Google firebase, works perfectly when I run directly on the mobile but when I generate the signed APK and put it in the internal test of the play store it does not login. I think it's not an error in the code because it's working outside the play store, maybe it's some configuration on the firebase or internal test or some other one I do not know. If any of you have been through this please help me.