Quoting Keith Bainbridge (keithrbaugroups@gmail.com):
Russell, Rick mentioned earlier today that you are restricting access to meets. Should I need a password? that I haven't noticed.
I can't remember what I might have said except perhaps that, on Russell's server, a room isn't available to ordinary, anonymous users until someone with prearranged username/password credentials enters it to 'open' the room. Thus, the 'a' room in use on Russell's server became available this evening around 6pm when Russell authenticated himself to Jitsi Meet, and opened it. Nobody has otherwise set any password. (In Jitsi Meet, it's possible to set / unset / change an entry password for an in-use room, e.g., if it suddenly becomes necessary to deter disruptive people from entering.)