[Process] Need to add public documentation about how to sign-in using GameCenter

[guirouxxx]

[REQUIRED] Please fill in the following fields:

• Unity editor version: 2020.1.17f1
• Firebase Unity SDK version: 7.0.2
• Source you installed the SDK: .unitypackage (.unitypackage or Unity Package Manager)
• Problematic Firebase Component: Auth (Auth, Database, etc.)
• Other Firebase Components in use: Firestore (Auth, Database, etc.)
• Additional SDKs you are using: _____ (Facebook, AdMob, etc.)
• Platform you are using the Unity editor on: Mac (Mac, Windows, or Linux)
• Platform you are targeting: iOS, Android (iOS, Android, and/or desktop)
• Scripting Runtime:Mono (Mono, and/or IL2CPP)

[REQUIRED] Please describe the question here:

Hi,

I would like to add the GameCenter Authentication with Firebase to my Unity Game (for iOS). But in the documentation there isn't the GameCenter part (only Play Games one). Is there a way to integrate Game Center auth with unity ?

[chkuang-g]

I think GameCenter signin should be pretty straightforward.

Here is code from another Unity sample project: MechaHamster
https://github.com/google/mechahamster/blob/b5ab9762cc95a2a36156d0cbd1dc08fb767c4080/Assets/Hamster/Scripts/Menus/GameCenterSignIn.cs#L45

Hope this helps!

[chkuang-g]

But hey, I guess you are right, we do have a missing public documentation for GameCenter.
https://firebase.google.com/docs/auth/unity/apple

Let me change this to a process to add the public doc.

[guirouxxx]

Okay, thank you for the link really helpful!