In STEL Order you can delete users whenever you want.
To remove a user from the system access with the Super-administrator user to your profile and select: My STEL Order > Manage additional users > Remove users.
Add the number of users you are going to remove and in the Select the users you want to remove check the boxes corresponding to the users you are going to remove . Click Next and OK.
This section will only be visible from the Super-Administrator user.and Accept.