I’m developing a solid app and I wanted to give permission to a friend to access a folder.
Which is the simple way to do that?.Is there any library to facilitate that?.
You can use the sharing pane to grant other WebIDs access to your resources, here is a tutorial that shows you how.
AFAIK there isn’t any tools out there right now (except the sharing pane via the data browser) that helps you with resource sharing, but I wrote a reply to another similar thread on this, might be of interest to you as well
You should find some inspiration there