For now, only users marked as administrators can login to the Web UI. Session timeout is 30 minutes by default, but can be changed on the settings file. This kind of changes only take effect after restarting Pathfinder Server service.
By entering user and password, the user can login into the Web UI using the same authentication method as Pathfinder.
By clicking on the user icon on the sidebar, a popup window will be shown, then you can choose to logout.