Log in to your Sumac database. In the Sumac console, click Utilities, Sumac Administration, then click Users.
The Users list will open. From here, there are three options:
1) Click New to create a new User.
2) Select an existing User Name and click Delete to remove it.
3) Double-click an existing User Name to make changes to the user permissions for this account.
Have a look at this how-to video to learn more about managing User Profiles in Sumac: http://softwoodtechnology.com/video-create-user-accounts/