可以使用 Firebase Auth.auth() 函数检索 GoogleSignIn 用户吗？

Question

Within my app, I have 2 kinds of authentication:

1. Email address
2. Google Sign In

This is the relevant code for creating a user when they authenticate with their email address:

// Create the user
Auth.auth().createUser(withEmail: email, password: password) { (result, err) in
    // Check for errors
    if err != nil {
        
        // There was an error creating the user
        self.showError("Error creating user")
    }
    else {
        
        // User was created successfully, now store the first name and last name
        UserService.createProfile(userId: Auth.auth().currentUser!.uid, firstName: firstName, lastName: lastName, email: email) { (user) in
        }
    }
}

For users who authenticate with their email address, I'm already able to successfully call several functions for them all over my app. For example:

• To get the user's unique ID: let currentUser = Auth.auth().currentUser?.uid
• To check is a user is signed in when opening the app: Auth.auth().addStateDidChangeListener { (auth, user) in }

This is what I have in my AppDelegate to sign in a user with Google: func sign(_ signIn: GIDSignIn,: didSignInFor user, GIDGoogleUser:, withError error: Error!) {}

Is there a way to use those existing Auth.auth() functions for Google-authenticated users? Or would I need to add new code all over my app to account for these users?

Answer 1

I'm not sure I understand, but will try to answer the most likely questions.

If you want to sign the Google-authenticated user in to Firebase, you can do so by calling Auth.auth().signIn(with: credential) as shown in the documentation on authenticating with Firebase after signing in with Google .

Once a user signs in with Firebase Authentication (no matter with what provider) the auth.currentUser will bet set for them (and cleared when they sign out of Firebase), and addStateDidChangeListener will fire events for them.