[xubuntu-users] missing "users and groups" in 16.04.1 minimal install

[comcast]

I just installed xubuntu 16.04 on my laptop, using the minimal iso and 
then select "xubuntu minimal package" (and "standard system utilities"). 
After the installation is finished, I logged back in and I noticed that 
under
   whisker menu -> system
I cannot find the usual "users and groups" menu for adding/changing 
users settings.  How can I add this back to my minimal install?

THANKS!