To create a new Supervisor (User) you click staff > users in the left menu
Click on the plus sign in the bottom right corner.
Fill out the different fields:
Role = User
User Profile = Default
Full Name = The Supervisors full name
Username = firstname.lastname (note that you should only use lowercase letters)
Email = Email to the Supervisor
Password = minimum 8 characters
Confirm Password = Type the same password again
Description = Optional but good to add working title of the Supervisor
Auto generate internal number should be activated and blue.
Then press ADD USER