Cache Ably auth-cookie

[pavkam]

• Cache the cookie locally (for its validity time),
• Also, added cookie settings to avoid Firefox complaints: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie#samesitesamesite-value

[roncohen]

how about also skipping calls to our ingest if we just did those calls? (non-spa apps)

[pavkam]

how about also skipping calls to our ingest if we just did those calls? (non-spa apps)

This one avoids one call to Ingest and one to Ably. One more call remains - is the prompt-init. I guess we can avoid it as well indeed. Let me see what I can do.

[pavkam]

how about also skipping calls to our ingest if we just did those calls? (non-spa apps)

Done, this should avoid the init call as well now.

[Munter]

I think we should change the getAuthToken interface to never throw and instead just return undefined in the case of an invalid cookie payload