Sign In With Slack Oauth is now using OpenID Connect standard

[kwent]

Not really an issue, but i wanted to make sure people are aware:

It's based on the OpenID Connect standard, built on top of OAuth 2.0.

New flow: https://api.slack.com/authentication/sign-in-with-slack
Legacy flow: https://api.slack.com/legacy/sign-in-with-slack

I believe https://github.com/m0n9oose/omniauth_openid_connect can support Sign In with Slack new Oauth flow. (Untested)

[fayeroske]

I'm also trying to sort this one out, in the throes of our Granular Scopes / OAuth 2.0 v2 migration.

It looks like this is the certified implementation package. Though it'd be cool if we didn't have to add another gem to our solution for it.

It sounds like this actually might be an issue. Slack Support informed us that identity.* scopes are deprecated, and any future changes to our Slack App will be rejected if we don't upgrade to use the OpenID scopes.

[kwent]

https://github.com/amkisko/omniauth-slack-openid.rb does it well