OpenVPN Rockon + 2FA Google Authenticator

Hi;

Testing Rockstor as a migration from another NAS solution.

I have the OpenVPN rock on up and running; was pretty painless.

I have a requirement for 2FA and prefer Google Authenticator.

Has anyone configured this with the rock-on OpenVPN solution?

I can set this up manually but am worried about breaking things.

Anyone have this working? Another 2FA solution?