You must have the user permission in order to work in the User Configuration window.
User configuration allows you to:
"Create a User Account"
"Modify a User Account"
"View Details of a User Account"
"Clone a User Account"
"Delete a User Account"
"Terminating an Active Session"
"Add a iTRAC Role"
"Delete iTRAC Role"
"Viewing details of an iTRAC Role"
The installer will create the following default users on the Sentinel Server: