Add new functionality

Hi, I am developing an application for the management of an online sports platform.

I need to modify JITSI to add two functions:

The first: to have the possibility for a user who connects to an online workout to choose to be visible only by the trainer and not to other users.

The second: for a fitness trainer, display the users by 10 and switch to the following users every 20 seconds.

Could you direct me to which part of the source code to modify to complete this task.

These changes need to be done in jicofo and you need to be able to differentiate participant and trainer.

This will be jitsi-meet change.