If I understand correctly, with UniGUI all files that need to be served to any user go in a common /files/ folder. So how do I stop User 1 from viewing User 2's files (I'm using the UniPDF viewer). For example, if I generate a pdf for User 1 with a copy of their invoice (user1_invoice.pdf), how do I stop User 2 just making a guess and typing in https://www.mydomain.com/files/user1_invoice.pdf in an attempt to find a copy of user 1's invoice. I can obviously use a random name for