Setup cert+username+password authentication on OpenVPN server

[Bob-P]

Hello,

i have a running OpenVPN server as a service on my Truenas and i'd like to only be able to connect to it with the client certificate, username and password.
I have tried using these additionnal parameters but the service fails to start when inserted
(https://openvpn.net/community-resources/using-alternative-authentication-methods/)
or those provided in the manual
(https://openvpn.net/community-resources/reference-manual-for-openvpn-2-0/)

Is it at all supported on Truenas or not ? I didn't either find the scripts used in the openvpn directory.

Thanks a lot for your help !

Sincerely,