Way to auto-set all users' screens to NOT go idle/lock?

Hello,

The following screenshot shows how users prefs are automatically set:
https://pasteboard.co/HVJeUSi.png that is:
1.  "Regard the computer as idle after:" 30 minutes,
2.  "Activate screenshaver when computer is idle"
3.  "Lock screen when screensaver is active"

This is a problem as once the screen is locked, students are unable to log
back in. I imagine the reason that re-logging in is not working is related
to the fact that we are using pbis-open to join and authenticate through
our districts Active Directory. However, that issue I'm not trying to
solve. I want to find a way to automatically change one of the above 3
settings automatically for all users. I've checked ltsp.conf manpage:
http://manpages.ubuntu.com/manpages/bionic/man5/lts.conf.5.html but don't
see options for this. Am I missing something?

Thanks,
David

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