Authentication in CUPS (IPP) and sane (eSCL)?

[Charles Curley <charlescurley@charlescurley.com>]

I have just bought an HP LaserJet MFP M232-M237 - IPP Everywhere. It
will let me require authentication for IPP clients. This would be a
nice thing to have in a SOHO environment, and a requirement in any
large institution.

I can set the printer easily enough. What I haven't been able to do is
tell CUPS to authenticate itself. How do I do that?

Similarly for eSCL Authentication and sane?

Searching has been less than elucidating.

-- 
Does anybody read signatures any more?

https://charlescurley.com
https://charlescurley.com/blog/