Allow connection with AuthSession cookie

[adrienverge]

Hey @bmario 👋, thanks for the good job! That's the only async CouchDB lib I've found, that works with modern Python.

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Upon first connection with username and password, CouchDB servers
install an AuthSession cookie in the browser.

This commits allows connecting using this cookie, e.g.:

CouchDB("http://localhost:5984", cookie="ZGVtb0B0b2x0ZWNrLmNvbT...")

[bmario]

These changes correlate to this, don't they?

Back in the days, I also used cookies for authentification, but removed it in the end because I had troubles with long-running sessions. Moving this issue to the user though sounds like a middle ground for now. For the future, I'd like to have conviencen functions, so the user can get the cookie using aiocouch itself.

[adrienverge]

These changes correlate to this, don't they?

exactly

Back in the days, I also used cookies for authentification, but removed it in the end because I had troubles with long-running sessions. Moving this issue to the user though sounds like a middle ground for now.

Sure. But sometimes the caller code doesn't know username and password, for example if it only handles cookies passed by the client.

For the future, I'd like to have conviencen functions, so the user can get the cookie using aiocouch itself.

That would be nice indeed.