How do I invite people to a private jam?

Hi Shroom,
Here is how to have a private jam:

Click the “New jam” button in the “Connect to server…” dialog. You
will be in an empty jam session and can control who is allowed to join
by going to Admin | Access Control. Once you've entered your
bandmates' usernames they will see the jam session and be able to join
when they open the “Connect to server…” dialog.