Auth.auth().createUser(withEmail: emailTextField.text!, password: "abc123!") { (authResult, error) in
            // [START_EXCLUDE]

                guard let email = authResult?.user.email, error == nil else {
                    print(error!)
                    print("NO!!!!!!")
                    return
                }
                print("(email) created")


            // [END_EXCLUDE]
            guard let user = authResult?.user else { return }
        }