1C Bitrix - How to use email instead of login?

Question

1C-Bitrix

How to use email instead of a login when registering so that there are no problems with rights and user groups in the future?
I found a 9-year-old article , is it still relevant or is it possible to do something differently now?
Component: custom registration.

Answer 1

Adding this code to init.php helped me:

AddEventHandler("main", "OnBeforeUserLogin", array("CCustomHookEvent", "DoBeforeUserLoginHandler"));
class CCustomHookEvent {
        //  Проверяем пришел ли email или login и если email авторизуем по нему
        function DoBeforeUserLoginHandler( &$arFields )
        {
            $userLogin = $_POST["USER_LOGIN"];
            if (isset($userLogin))
            {
                $isEmail = strpos($userLogin,"@");
                if ($isEmail>0)
                {
                    $arFilter = Array("EMAIL"=>$userLogin);
                    $rsUsers = CUser::GetList(($by="id"), ($order="desc"), $arFilter);
                    if($res = $rsUsers->Fetch())
                    {
                        if($res["EMAIL"]==$arFields["LOGIN"])
                            $arFields["LOGIN"] = $res["LOGIN"];
                    }
                }
            }
        }
        // End 
}