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 - [Passport](https://github.com/jaredhanson/passport) - Simple, unobtrusive authentication.
 - [Grant](https://github.com/simov/grant) - OAuth middleware for Express, Koa, and Hapi.
-- [CloudRail](https://github.com/CloudRail/cloudrail-si-node-sdk) - Unified API for social authentication (Facebook, Twitter, Slack, Instagram, …).
 
 
 ### Authorization