VPN must connect on boot.

Hey everyone, this is my first post here and I hope I am posting in the right place. I am running LibreElec on a Pi Zero, with Kodi Krypton. I am running openVPN as well. I was wondering if it’s possible to make a VPN connection REQUIRED for the machine to boot. And if no VPN is detected, it will simply show the config page so you must choose a provider and enter you credentials to boot into LibreElec and Kodi. Is this something that can be done? Many thanks in advance for any advice you may have.