bitrix-module/intaro.retailcrm/classes/general/history/RetailUser.php

<?php

/**
 * Class RetailUser
 */
class RetailUser extends CUser
{
    /**
     * @return int|mixed|string|null
     */
    public function GetID()
    {
        $rsUser = CUser::GetList(($by = 'ID'), ($order = 'DESC'), ['LOGIN' => 'retailcrm']);

        if ($arUser = $rsUser->Fetch()) {
            return $arUser['ID'];
        }

        $retailUser = new CUser;
        $userPassword = uniqid();

        $arFields = [
            'NAME'             => 'retailcrm',
            'LAST_NAME'        => 'retailcrm',
            'EMAIL'            => 'retailcrm@retailcrm.com',
            'LOGIN'            => 'retailcrm',
            'LID'              => 'ru',
            'ACTIVE'           => 'Y',
            'GROUP_ID'         => [2],
            'PASSWORD'         => $userPassword,
            'CONFIRM_PASSWORD' => $userPassword,
        ];

        $id = $retailUser->Add($arFields);

        if (!$id) {
            return null;
        }

        return $id;
    }
}