Note: in order to remove a user, you need to be either:
- a "manager" of the site of the user you want to remove
- or a "superadmin"
Removing users is as simple as adding them:
Users -> Locate the user you would like to remove -> click the user name and choose the Delete button:
Should you learn you removed the user and ... regret it somehow? Do not worry, you may even restore the user yourself.