You should now be able to connect to your VPN server. Go to the user login page and log in with the credentials you gave to the previously mentioned non-administrator user:
https://<ip-or-hostname-of-vpn-server>/
After logging in, you will have the option to download the OpenVPN client with configuration which is specific to your account. Alternatively, if you already have a VPN client installed, you can just download the configuration on its own.