Just as an error indicates that a client identifier for this application was not found.
You need:
Go to developer console projects
APIs & auth
Credentials
Create new client ID:
Installed application
Android
Enter package name
Enter SHA1 for RELEASE OR DEBUG (which ever one you want it to work with)
Make deep linking choice
Create
I will not explain how to get SHA1 or something else, as this is easy to find.
, , , , - . .
, google-services.json, , .