Hi Terry. You have these options:
- Delete the user's account from the community: go to user profile> edit> delete user permanently> save.
- Suspend Account: go to user profile> edit> change the status from live/active to suspended by moderator> save.
- If you have sent the "Email Invitation" for the user to join the community, if the user has not registered yet, you can revoke the invitation from Admin Panel> Members> Invitation> (...)> Revoke