You can now sign-in to some services using Slack
There is a sign-in SDK for FaceBook, Twitter, Google and this list goes on and on. However, Slack is also planning to be part of this companies.
Slack, a popular messaging platform dedicated for businesses, just released its log-in SDK for developers which means if you are a developer, you can use this SDK to allow Slack users to sign-up to your site.
Source – TheNextWeb