impl<ViewT : LoginView> LoginPresenter<ViewT> {
    pub fn register(&mut self, view: Box<ViewT>, service: Box<LoginService>) {
        self._view = Some(view);
        self._service = Some(service);
        let callback = ||{
                    self.login(&String::from("123"), &String::from("123"));
                    };
        match self._view {
            Some(ref mut v) =>
            {
                v.set_login_callback(callback);
            },
            _ =>  println!("Oh now"),
        }
    }

    fn login(&self, username: &String, password: &String) {
        let user = User { name: username.clone(), password: password.clone() };
        let mut is = false;
        match se
            Some(reflf._service { s) => is = s.login(&user),
            _ =>  println!("Oh now"),
        }
        if !is {
            match self._view {
                Some(ref v) => v.show_error(),
                _ =>  println!("Oh now"),
            }
        }
    }
}