I am desperately trying to implement Google Sign-In ( for Leaderboards and Achievements), but I get a INTERNAL_ERROR, every time, I double-checked everything, both production and debug SHA-1 are present. However, I have accidentally linked my project to Firebase ( if there is a way to completely unlink it, please tell me, I've tried everything, in my Play Console there still is the Firebase Icon next to my app) and when I inspected the google-services.json file I got from Firebase, the entry
"google_signin_service": {
"status": 2
},
(which I found in a sample .json file) was missing, NOW, what do I do ? Do I try and copy it in my json file ? Do I have to start an app all over again to implement the Sign-In, because apparently un-linking Projects does not work, thank you !