let newUser = PFUser()

        // set user properties
        newUser.username = usernameField.text
        newUser.password = passwordField.text

        newUser.signUpInBackground { (success: Bool, error: Error?) in
            if let error = error {
                print(error.localizedDescription)
                if error._code == 202 {
                    print("Username is taken")
                }
            } else {
                print("User Registered successfully")

            }
        }