public function resolve($id)
 {
     if (isset($id)) {
         $complaint = Complaint::find($id);
         if (isset($complaint)) {
             $complaint->status = 'Resolved';
             $complaint->save();
             return json_encode(array('message' => 'done'));
         } else {
             return json_encode(array('message' => 'invalid'));
         }
     } else {
         return json_encode(array('message' => 'invalid'));
     }
 }