How to transfer items from the shopping cart during authorization?

Question

1C-Bitrix

Friends, I send goods from the cart through the Bitrix api. Like this:

$result=Add2BasketByProductID(
    $_REQUEST['id'], 
    intval($_REQUEST['count']), 
    array(), 
    array()
  );

The product is added, everything is fine. But it turns out that not an authorized user and an authorized one are different. and baskets are different.
How can I save the products that I added to the cart before authorization or registration during authorization?