public function cleanUser(string $validate = null): int
    {
        $result = 0;
        if ($validate) {
            $validateTo = new DateTime;
            $validateTo->modify($validate);

            /** @noinspection PhpUndefinedMethodInspection */
            $list = $this->getList()
                ->where([
                    $this->tableName[0] . '.active' => false,
                    $this->tableName[0] . '.added IS NOT NULL',
                    [$this->tableName[0] . '.added<=%dt', $validateTo],
                ]);

            foreach ($list as $item) {
                if ($this->delete($item[self::COLUMN_ID])) {
                    $result++;
                }
            }
        }
        return $result;
    }