Deny access if user has not JWT token

thanks to this great guide: i now have a running Jitsi with JWT authentication that can be used in my web app.

Now, if a user tries to create a room in my Jitsi server by going to: http://jitsi/randomroom he gets in a window without audio and video and cannot join the room, but i would like to block him so that he cannot enter in the videochat window. Is there a way to get it by maintaining JWT authentication running?

Thanks in advance and greetings