Получение количества пользователей по фильтру

 $rsUsers = CUser::GetList(
                    ($by = "NAME"),
                    ($order = "desc"),
                    ['ACTIVE' => 'Y', 'UF_ROLE' => $enum_master_id, 'UF_SERVICES' => $el['ID'], 'UF_CITY_ID' => $_SESSION['REASPEKT_GEOBASE']['ID']],
                    array(
                        "SELECT" => array("ID"),
                        "NAV_PARAMS" => array("nPageSize" => 1,"bDescPageNumbering" => "N","bShowAll" => "N")
                    )
                );
                $el['UF_MASTER_COUNT'] = $rsUsers->NavRecordCount;
                while ($arUser = $rsUsers->Fetch()) {
                    $el['UF_MASTER_COUNT']++;
                    $el['MASTERS'][] = $arUser['ID'];
                }