Google Sign In & Firebase with SwiftUI

Hi all I was trying to use sign in with google and firebase in a SwiftUI project. Now checking the old implementation methods and also some suggestions got from the net I am having problem with this part of the code

private func authenticateUser(for user: GIDGoogleUser?, with error: Error?) {
  // 1
  if let error = error {
    print(error.localizedDescription)
    return
  }
  
  // 2
  guard let authentication = user?.authentication, let idToken = authentication.idToken else { return }
  
  let credential = GoogleAuthProvider.credential(withIDToken: idToken, accessToken: authentication.accessToken)
  
  // 3
  Auth.auth().signIn(with: credential) { [unowned self] (_, error) in
    if let error = error {
      print(error.localizedDescription)
    } else {
      self.state = .signedIn
    }
  }
}

I'm getting errors with this authentication constant

  guard let authentication = user?.authentication, let idToken = authentication.idToken else { return }

The error is Value of type 'GIDGoogleUser' has no member 'autentication'

i know google dropped some properties replacing them...currently how can i update the google login implementation in SwiftUI?

Here is how you can authenticate a Firebase user when using Google Sign-In using the latest release (7.0.0) of the Google Sign-In SDK:

extension AuthenticationViewModel {
  func signInWithGoogle() async -> Bool {
    guard let clientID = FirebaseApp.app()?.options.clientID else {
      fatalError("No client ID found in Firebase configuration")
    }
    let config = GIDConfiguration(clientID: clientID)
    GIDSignIn.sharedInstance.configuration = config

    guard let windowScene = UIApplication.shared.connectedScenes.first as? UIWindowScene,
          let window = windowScene.windows.first,
          let rootViewController = window.rootViewController else {
      print("There is no root view controller!")
      return false
    }

      do {
        let userAuthentication = try await GIDSignIn.sharedInstance.signIn(withPresenting: rootViewController)

        let user = userAuthentication.user
        guard let idToken = user.idToken else { throw AuthenticationError.tokenError(message: "ID token missing") }
        let accessToken = user.accessToken

        let credential = GoogleAuthProvider.credential(withIDToken: idToken.tokenString,
                                                       accessToken: accessToken.tokenString)

        let result = try await Auth.auth().signIn(with: credential)
        let firebaseUser = result.user
        print("User \(firebaseUser.uid) signed in with email \(firebaseUser.email ?? "unknown")")
        return true
      }
      catch {
        print(error.localizedDescription)
        self.errorMessage = error.localizedDescription
        return false
      }
  }
}

Check out Getting started with Google Sign-In on Apple platforms - YouTube, in which I explain the configuration options in more detail.