private files

Hello, This is an interesting plugin. I have built a private file system in my wordpress project. This restricts users to have credentials to access the media in a group / project they and other users have uploaded. This plugin is what I need for offloading, but I see that it requires public access to be granted in the bucket settings. I understand so far that an authorisation token is required for private downloads from the B2 Backblaze service, and I presume most other cloud services. Is there something you have for this? This plugin I think would be perfect for me, and possibly a number of buddypress / social media / bbpress type sites if the private functionality is working.