no token, from another container: GET /library/sections -> 401
no token, from another container: GET /:/prefs -> 401
no token, from another container: GET /identity -> 200
no token, from inside the Plex container (127.0.0.1): GET /library/sections -> 401
Preferences.xml keys of interest: PlexOnlineToken=" customConnections=" PlexOnlineUsername=" 
