Hi Jeff,
Are you using the
OpenVPN Access Server product? If so this is indeed easy and quick. In the admin web UI you can delete or disable the user, delete their profile[s], and actually remove a connected user.
If you're using some other OpenVPN implementation (based on community version openvpn) you have asked in the wrong subforum, and we'll have to move this topic to the proper place.
regards, rob0