Troubleshooting rabbithole of the day:

• My Unifi Protect metrics exporter no longer works because it crashes on a KeyError
• The KeyError is actually an unhandled auth error, oops.
• The auth just fails with no further details. Added plenty more debugging and turns out the #aiohttp session object cookie jar is empty, no auth for me.
• The Set-Cookie header on the POST call response does have the right token, so login works! But the response cookies is empty, so is the session cookie jar. Hrmph!
• Figure out behind the scenes it loads the header raw into a http.cookies.SimpleCookie, which when manually replicating indeed silently without error just doesn't load the data! Not great.
• Turns out it balks if the cookie contains a partitioned argument, just refuses silently to load the cookie.

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