Hello!
Jitsi Meet allows to close the server for guests with password and login. This ability can be applied using different ways. So, one of them it is just to set password and login for the server and all guests will have to login with password and login when they open the room using UNA room link or create the room directly on your server. Also It is possible to login only the first member with password/login and the all other members who open the room by the link will be joined without login. Example how to do this: https://www.youtube.com/watch?v=SWsO3_roGTw
I suppose, all these options with passwords/login are not compatible for Jitsi Una integration and the most comfortable way is to use JWT authentication. It allows to login user to the server using generated token, thus it is possible to open the rooms for the users who already logged to the UNA and ask for login persons who open the server without login in UNA. Plugin details https://github.com/jitsi/lib-jitsi-meet/blob/master/doc/tokens.md
JWT integration requires changes in current Jitsi UNA integration and you should have your own Jitsi meet server with additional installed plugins.

Hi, thank you for your reply.

When you say "requires changes in current Jitsi UNA integration" - do you mean like core code modifications, that would make the plugin/una not possible to update anymore? I already have our own jitsi meet server. I can see the details there about how to add token checks, but where do you configure tokens to be automatically generated for logged in UNA users that start a videochat?