You can create a page or multiple pages where you need a login.

Choose this page in your sitemap and set it locked with the top button. (this is in page2 of website x5)

Goto page4 advanced settings and choose reserved area. add a reserved area, create a login name and user password. set it to the closed page you made earlyer.

Now your ready upload and accesing this page while prompt you for login credentials.

BR A