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node-jsonwebtoken
JsonWebToken implementation for node.js http://self-issued.info/docs/draft-ietf-oauth-json-web-token.html
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Koala
A lightweight Facebook library supporting the Graph, Marketing, and Atlas APIs, realtime updates, test users, and OAuth.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
As we could see, we go through the same procedure for every provider. First, we obtain access_token and use it to receive the user's info. In Increaser, once the user is validated, the back-end generates auth data via jsonwebtoken library.
To use Facebook, we need to create an app on Facebook for Developers. The procedure looks similar, this is what we will have on Client OAuth Settings.