How to disable jitsi meet on main server and only access by external api

HI Jitsi Team
Thank you for support
I am running project for my educational platform and its run nice
I need a help
I am using external api of jitsi meet for my project and want to block conference on main server i mean to say - i do not want to user can access direct conference room. user can only join on external api.
So please can you suggest me how to block direct access

Look into JWT Tokens.