public function attempt(AuthAttemptRequest $request)
{
$credentials = $request->only('username', 'password');
if ($this->authService->attempt($credentials, $request->has('remember'))) {
return \Redirect::to('/');
} else {
return \Redirect::back()->withErrors(array('warning' => 'ユーザ名又はパスワードが正しくありません'))->withInput();
}
}