New users can only be set up if you are a supervisor on the Ava pa system. Any new user can be a standard user or a supervisor. A supervisor can change any aspect of any other user including other supervisors. Supervisors can reset any other users password. A standard user can only reset their own password.
In any screen navigate to the Set up / Users Menu:

The following screen will be shown

Hint: the easiest way to make non Supervisors is to check and
then uncheck the Supervisor box. This will set most permissions to
edit.
Enter the new user's details in the text boxes.
Then select each of the tabs below and update the default settings
as required for the limits of the new user.
If the application is open on the desk top of the user, a short cut
can be created on that desk top with their login name.