public function deleteUserFromGroup($groupId, $userId)
    {
        try {
            $user = Sentry::getUserProvider()->findById($userId);
            $group = Sentry::getGroupProvider()->findById($groupId);
            $user->removeGroup($group);

            return Response::json(array('userDeleted' => true, 'message' => trans('syntara::groups.messages.user-removed-success'), 'messageType' => 'success'));
        } catch (\Cartalyst\Sentry\Users\UserNotFoundException $e) {
            return Response::json(array('userDeleted' => false, 'message' => trans('syntara::users.messages.not-found'), 'messageType' => 'danger'));
        } catch(\Cartalyst\Sentry\Groups\GroupNotFoundException $e) {
            return Response::json(array('userDeleted' => false, 'message' => trans('syntara::groups.messages.not-found'), 'messageType' => 'danger'));
        }
    }