Google Sign In - How To Add Games.scope_games_lite?

I'm trying to set up Google Sign In for an Android game. The sign in works fine and I can select a Google account and sign in. But when calling the Leaderboard, it shows me an erro

Solution 1:

I found the problem... My gradle file was fine, but from my manifest file was missing this:

<meta-data android:name="com.google.android.gms.games.APP_ID"
           android:value="@string/app_id" />

You can find your App ID when logging into Google Play Console --> Game Services --> "Your game" --> "Game Details", directly under the header (which is the name of your app)