public function login(Request $request)
 {
     $sign_in_twitter = true;
     $force_login = false;
     Twitter::reconfig(['token' => '', 'secret' => '']);
     $token = Twitter::getRequestToken(route('twitter.callback'));
     if (isset($token['oauth_token_secret'])) {
         $url = Twitter::getAuthorizeURL($token, $sign_in_twitter, $force_login);
         $request->session()->put('oauth_state', 'start');
         $request->session()->put('oauth_request_token', $token['oauth_token']);
         $request->session()->put('oauth_request_token_secret', $token['oath_token_secret']);
         return redirect($url);
     }
     return route('twitter.error');
 }