Why, after assigning login and email in OnBeforeUserUpdateHandler, they are not accepted by Bitrix?

Question

1C-Bitrix

Removed the login and email fields from the profile form. I put them in the event before changing the profile, they are filled in, visible in Before and After, but the profile is not saved and errors are displayed "Login must be at least 3 characters" and "Invalid E-Mail"
What's wrong?

AddEventHandler("main", "OnBeforeUserUpdate", "OnBeforeUserUpdateHandler");
function OnBeforeUserUpdateHandler(&$arFields)
{
    $arFields["ID"] = CUser::GetID();
    $arFields["LOGIN"] = CUser::GetLogin();
    $arFields["EMAIL"] = CUser::GetEmail();
}

AddEventHandler("main", "OnAfterUserUpdate", "OnAfterUserUpdateHandler");
function OnAfterUserUpdateHandler(&$arFields)
{
    var_dump($arFields);
}

Answer 1

You're reading them just as functions, not from the current user's specific object.
Try like this:

function OnBeforeUserUpdateHandler(&$arFields)
{
    global $USER;
    $arFields["ID"] = $USER->GetID();
    $arFields["LOGIN"] = $USER->GetLogin();
    $arFields["EMAIL"] = $USER->GetEmail();
}