Interesting track for Slack to take. Curious about a couple of things in case anyone from Slack is listening:<p>1. Why not use OpenID Connect (<a href="http://openid.net/connect/" rel="nofollow">http://openid.net/connect/</a>) on top of OAuth?<p>2. How does this compare to Okta, Ping, etc.? Seems like this may be a solved problem in the enterprise space and I'm curious what Slack brings to the table that couldn't be done with existing solutions.