@IBAction func loginBtnTapped(sender: AnyObject) {
    let username = usernameTextField.text!
    let password = passwordTextField.text!

    _actionsCreator.login(username, password)
}

override func viewDidLoad() {
    super.viewDidLoad()
    FluxDispatcher.bind(
      self,
      eventType: UserStore.UserChangeEvent.LoggedIn,
      handler: onLoggedIn)
}

private func onLoggedIn(result: NSNotification!) {
    let message = "Welcome \(_userStore.user!.displayName)"

    let alert = UIAlertController(title: "Login", message: message, preferredStyle: UIAlertControllerStyle.Alert)
    alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
    self.presentViewController(alert, animated: true, completion: nil)
}