How to check if user has valid Auth Session Firebase iOS?

Question

I wanna check if the user has still a valid session, before I present the Home View controller of my app. I use the latest Firebase API. I think if I use the legacy, I\'ll be ab

Answer 1

override func viewDidLoad() {
FIRAuth.auth()!.addStateDidChangeListener() { auth, user in
            // 2
            if user != nil {
                let vc = self.storyboard?.instantiateViewController(withIdentifier: "Home")
                self.present(vc!, animated: true, completion: nil)
            }
        }
}

Source: https://www.raywenderlich.com/139322/firebase-tutorial-getting-started-2