@IBAction func registerButtonAction(sender: UIButton) {
        guard let username = usernameField.text, email = emailField.text, password = passwordField.text else{
            print("Successfully registered")
            return
        }
        FIRAuth.auth()?.createUserWithEmail(email, password: password, completion: { (user: FIRUser?, error) in
            if error != nil{
                print(error)
                return
            }
            guard let uid = user?.uid else{
                return
            }

            //Successfully authenticated user
            let ref = FIRDatabase.database().referenceFromURL("refToMyAppInFirebase")
            let usersReference = ref.child("users").child(uid)
            let values = ["username": username, "email": email, "reputation": 0]
            usersReference.updateChildValues(values as [NSObject : AnyObject], withCompletionBlock: {
                (err, ref) in

                if err != nil{
                    print(err)
                    return
                }
                print("User saved and logged in")
                self.performSegueWithIdentifier("fromRegister", sender: nil)
            })
        })
    }