public function getLastLogon($username)
    {
        $this->adldap->utilities()->validateNotNull('Username', $username);

        $userInfo = $this->info($username, ['lastlogontimestamp']);

        if (is_array($userInfo) && array_key_exists('lastlogontimestamp', $userInfo)) {
            return AdldapUtils::convertWindowsTimeToUnixTime($userInfo['lastlogontimestamp']);
        }

        return false;
    }