I didn't use firebase in my mobile app project. I logged in with google with API key from my google cloud account. my app works as apk but when play console is installed, google login doesn't work
Merhaba Nurullah, you might need to add the SHA-1 & the SHA-256 keys that you can find on your app's console to your custom authentication system.
You will find these keys in Google Play Console -> Choose your app -> Setup -> App Integrity -> App Signing