guest logins created with script

I've used the script referred to on Dashamir's ltsp scenarios website as I
create a public/guest lab; I assume the latest version of that is here:
https://gitlab.com/Virtual-LTSP/VirtualBox/blob/bionic/scripts/create-guest-accounts.sh
The script appeared to run fine (xubuntu 18.04 server).

Sorry to be dim but some little questions follow:
What/where are the passwords for the (template) 'guest' account and the 255
other client accounts?

I think I expected the guest user accounts to be named 'guestXX' but they
are named 'ltspXX'. Is that as expected?

Perhaps there were some variables in the script I should have amended?

Thanks for any pointers, Mark

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