I want to set my additional user(s) to inactive.
As a user with admin privileges, you can edit access for other users.
You can set your added user to Inactive by navigating to your Account tab> under "Users"> then > "edit users" under> "actions" tab.
In the Actions tab you may set the user from Active to Inactive. This action will not be permitted if the user has an existing bid, contract or an ongoing transaction.