We use this to connect our HASS system to another server in the cloud so we can reverse proxy to HASS.
You must start from a tar file containing all the files needed for OpenVPN configuration. It must include a valid .ovpn file and certificate files.
Plugin addon looks like this
{
"archive": "base64 archive data"
}
You can convert any file to base64 running $ cat file.tar.gz | base64 -w 0