public function index()
 {
     $cacheTag = ['managers'];
     $cacheKey = 'index';
     $cacheKey .= http_build_query(array_only(Request::all(), $this->filters));
     $response = Cache::tags($cacheTag)->remember($cacheKey, 60 * 24 * 7, function () {
         $_db = Managers::select(['id', 'name', 'email', 'active', 'role', 'avatar', 'created_at', 'updated_at']);
         return $this->filter($_db)->get()->toArray();
     });
     return $response;
 }