public function update(UserWaiverRequest $request, UserWaiver $user_waivers)
 {
     foreach ($request->all()['data']['attributes'] as $key => $value) {
         if (isset($user_waivers->{$key})) {
             $user_waivers->{$key} = $value;
         }
     }
     $user_waivers->save();
     $resource = new Item($user_waivers, new UserWaiverTransformer(), 'user-requirements');
     return $this->fractal()->createData($resource)->toJson();
 }