Creating one link for clients to use when logging in to join a class

[AnniePilates]

My Zoom Pro account is integrated with Bookwhen. My clients are mostly an older demographic and find technology challenging. I am trying to create ONE passcode for them to use everytime they log in to a class with the Zoom link (rather than the randomly generated one). Do I have to edit this manually on my 'Meetings' list for each session or is there a way to override this so that it comes up each time?

Thought I had nailed it but had glitches this morning.

I do not want to use 'Waiting Room'