Is it correct to set noindex, nofollow through system.auth.authoriz?

Question

1C-Bitrix

For search engines, you need to close certain pages. In particular, those that are available only to registered users. You can do this through robots.txt. But there is a system.auth.authoriz component.
I believe that it would be useful to immediately add to the template.php of this component:

$APPLICATION->SetPageProperty("robots", "noindex, nofollow");

What do you think about this?