Allow user list retrival also for not logged in users with can_browse permission
Allow user list retrival also for not logged in users with can_browse permission

This allows also for setups where the anonymous user (i.e. not logged in user)
can access this information if it was given the can_browse permission.

htem/CATMAID,htem/CATMAID,fzadow/CATMAID,fzadow/CATMAID,fzadow/CATMAID,htem/CATMAID,fzadow/CATMAID,htem/CATMAID