[REQUIRED] Step 1: Describe your environment

• Xcode version: 13.1
• Firebase SDK version: 8.9.0
• Installation method: Swift Package Manager
• Firebase Component: Auth

[REQUIRED] Step 2: Describe the problem

Steps to reproduce:

Following this, I do share Auth over iCloud Keychain sync between iOS and macOS apps successfully.

However, if I try this with tvOS, it does not work. Does tvOS maybe not support Keychain Sharing?

Officially, tvOS supports it but there are some other users with issues.

I wonder if there could be an issue with Firebase's keychain access implementation.

Relevant Code:

    var tempUser: Firebase.User?
    do {
      try tempUser = Auth.auth().getStoredUser(forAccessGroup: accessGroupId)
    } catch let error as NSError {
      print("Error getting stored user: %@", error)
    }
    return tempUser // always nil