using Orbi VPN server with User Name/Password

Is there a way with the RBK50 and the VPN to allow a user name and password?

I have a friend that is currently over seas and he wants to watch some VoD stuff but they only allow people from NZ to access and watch it.

I have set my so my Orbi is in Router mode behind my normal Fibre Router in a DMZ zone.

 

And set up DDNS.

 

I can do the VPN but I would want to have username password rather than just giving a security config.

Or once I set up the VPN I can regenerate the config security incase a device gets lost.