Logged In: YES 
user_id=200117

When I run the following script on the workstation

import pwd, grp

entries = pwd.getpwall()
for e in entries:
    if e[2] < 0:
        print e
        
entries = grp.getgrall()
for e in entries:
    if e[2] < 0:
        print e
    
--------------------------

I get this output:

('nobody', '*', -2, -2, '', '/', '')
('nogroup', '*', -2, [])