public function getIterator(IteratorFilter $filter = null)
    {
        if (is_null($filter)) {
            $filter = new IteratorFilter();
        }

        $param = [];
        $formatter = new IteratorFilterSqlFormatter();
        $sql = $formatter->getFilter($filter->getRawFilters(), $param);

        $query = Query::getInstance()
            ->table($this->getUserDefinition()->table())
            ->where($sql, $param);

        return $this->userRepository->getByQuery($query);
    }