Android app does not connect to Firebase

Question

I\'m developing android app using Firebase GMS service.
I tried to follow their tutorials, i made project as they said, downloaded the json files.

But when I

Answer 1

I had same problem. I solved it by updating the sha-1 code to firebase console and re-importing google-json file from firebase. The main problem I found that after updating the android studio the sha-1 or md5 code has changed.