Parental controls / restricted access
Ability to set a password that must be entered before plug-in can be accessed.
Just putting this out here, will add this feature if many users need it or I will have too much spare time on my hands.
I examined the possibilities and they are quite limited.
First of all there is no way for a user to enter a discreet password, only possible input is search box (InputDirectoryObject) that is completely exposed to passing eye.
Furthermore, InputDirectoryObject does not work on current Plex Web interface and many other players, and only workaround I found is DumbKeyboard by coryo, which is a great add-on but inputting stuff with it is very tedious and requires Elevated flag which I do not want in my plug-in.
In short, I am not going to implement this feature at this state, maybe sometime later when Plex improves its Framework.