public function postLogin(LoginRequest $request)
 {
     if (Auth::attempt($request->only(['email', 'password']))) {
         return $request->ajax() ? json_encode(['error' => 0]) : redirect('/');
     }
     return $request->ajax() ? json_encode(['error' => 1, 'message' => 'The email or password wrong!']) : redirect()->route('login')->withErrors('The email or password wrong!');
 }