the creator lacks to put a user access control pos when I invite a friend to him he connects to my server he has all access but if that same friend gives his account before someone else will connect normal and have all access to the library of movie this is not good should have in the user restriction the option of how many devices it can connect itself is 1,2,3,4, etc.
Communicate your expectations and boundaries to those you share with. Don’t share with untrustworthy people.
In Settings → Network, there is a setting Remote streams allowed per user.
cut them off.
Harsh but true. 
