How to find out the user id during registration?

Question

1C-Bitrix

Good evening! Tell me how to find out the user id during registration?
The user must be inactive during registration.

<?
if(!defined('B_PROLOG_INCLUDED') || B_PROLOG_INCLUDED !== true) die();

global $USER, $arTheme;
\Bitrix\Main\Localization\Loc::loadMessages(__FILE__);
$APPLICATION->AddChainItem(GetMessage("TITLE"));
$APPLICATION->SetTitle(GetMessage("TITLE"));
$APPLICATION->SetPageProperty("TITLE_CLASS", "center");
?>
<style type="text/css">
  .left-menu-md, body .container.cabinte-page .maxwidth-theme .left-menu-md, .right-menu-md, body .container.cabinte-page .maxwidth-theme .right-menu-md{display:none !important;}
  .content-md{width:100%;}
  .border_block{border:none;}
</style>
<?if(!$USER->IsAuthorized()):?>
  <?
  // default fields, that you can change
  $arShowFields = array("LOGIN", "LAST_NAME", "NAME", "SECOND_NAME", "EMAIL", "PERSONAL_PHONE");
  $arRequiredFields = array("NAME", "EMAIL", "PERSONAL_PHONE");

  // get phone auth params
  list($bPhoneAuthSupported, $bPhoneAuthShow, $bPhoneAuthRequired, $bPhoneAuthUse) = Aspro\Max\PhoneAuth::getOptions();

  // add phone field after email field if phone auth supported and need for to register
  if($bPhoneAuthSupported && $bPhoneAuthShow){
    $arShowFields[] = "PHONE_NUMBER";

    // remove phone field
    $phoneKey = array_search("PERSONAL_PHONE", $arShowFields);
    if($phoneKey !== false){
      unset($arShowFields[$phoneKey]);
    }

    // search email field
    $emailKey = array_search("EMAIL", $arShowFields);
    if($emailKey !== false){
      $arShowFields = array_merge(array_slice($arShowFields, 0, $emailKey + 1), array("PERSONAL_PHONE"), array_slice($arShowFields, $emailKey + 1));
    }
    else{
      $arShowFields[] = "PERSONAL_PHONE";
    }

    if($bPhoneAuthRequired){
      $arRequiredFields[] = "PERSONAL_PHONE";
    }
  }
  ?>
  <?$APPLICATION->IncludeComponent(
    "bitrix:main.register",
    "main",
    Array(
      "USER_PROPERTY_NAME" => "",
      "SHOW_FIELDS" => $arShowFields,
      "REQUIRED_FIELDS" => $arRequiredFields,
      "AUTH" => "N",
      "USE_BACKURL" => "Y",
      "SUCCESS_PAGE" => "",
      "SET_TITLE" => "N",
      "USER_PROPERTY" => array()
    )
  );?>
  <?
    $USER->Update($ID, Array("ACTIVE" => "N")); // нужно чтобы эта функция работала
  ?>
<?else:?>
  <?$url = ($arTheme["PERSONAL_PAGE_URL"]["VALUE"] ? $arTheme["PERSONAL_PAGE_URL"]["VALUE"] : $arParams["SEF_FOLDER"]);?>
  <?LocalRedirect($url);?>
<?endif;?>

Answer 1

It would be more logical to use the OnAfterUserRegister event in this case .