Log in page to get access to files and documents

Hi,
On our web site we would like to have a page and subpages where we can upload documents and files that are only available for logged in users.
We have looked at a some membership plug ins, but since we only need this feature with documents and files, we would appreciate a recommendation on how to proceed. We are using Divi.
The page (log in) should be shown in the menu bar, and by clicking you get to log in and then get access to the page/subpages. It is a special log in for this specific page. It could be the same login and password for all users.