/**
  * Display a listing of the resource.
  * @return Response
  */
 public function index(Request $request)
 {
     $permissions = Permission::orderBy('module')->get()->pluck('name', 'id')->toArray();
     $users = [];
     if (request('permissions')) {
         $permission_id = request('permissions');
         $users = User::wherehas('permissions', function ($query) use($permission_id) {
             $query->where('permissions.id', $permission_id);
         })->get();
     }
     $all_users = User::get()->pluck('name', 'id')->toArray();
     return view('users::permissions.index', compact('permissions', 'users', 'all_users'));
 }