[Nut-upsuser] Purpose of LOGIN and LOGOUT

[Mark McMillan]

What is the purpose of the LOGIN <upsdevice> and LOGOUT commands in the
network protocol? It seems if I supply USERNAME and PASSWORD then I am able
to perform any operations on the device, so why would I need to use LOGIN?
And since LOGIN takes a <upsdevice> but LOGOUT does not, I guess that
LOGOUT is implicitly associated with the last (most recent) LOGIN? Which
means a single client cannot be logged into more than one device at a time?

Trying to understand the security model here...

Thanks
-Mark
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