/**
  * Adds the gallery
  *
  * @return Response
  */
 public function add(Request $request)
 {
     // get request data
     $email = $request->input('auth-email');
     $siteId = $request->input('auth-id');
     // get url, title and description
     $name = $request->json()->get('name');
     // add a gallery
     $gallery = Gallery::add($name, $siteId);
     if ($gallery !== NULL) {
         // return OK
         return response('OK, gallery added at = ' . $gallery->name, 200);
     }
     return response('Gallery already exists', 400);
 }