Google Play Games
Using Game Server credentials, you can automatically identify players signed in to Google Play Games.
You can enable this integration on the integrations page.

Authentication
To get started, create an OAuth client (ensure you create credentials for a Game server) and copy the details into the dashboard.
To identify a player, request a server auth code and pass the code to Talo. Talo will automatically sync the player without them needing to create an account.
Talo will also add helpful props to your player such as their display name and avatar URL.
More info is available in the Godot plugin docs and Unity package docs.