If you see this message:
Create a Zoom account or sign in:
In order to authenticate our meetings, users are required to sign into Zoom.
Please create an account at https://zoom.us/freesignup/ and make sure you are logged in before joining or you may run into an error page asking for authentication. (Users only need to sign into their zoom account to be authenticated.)
The Zoom support page can be found at https://support.zoom.us/hc/en-us/articles/206175806.
Authenitication error message tutorial: