Prelude Some months ago I decided to take a more serious look at Elixir (I drop the gory details about my background and studying different technologies, etc, etc). While I confess that I like F# and Functional Programming in general, the main reason here... A top-down look into Elixir for Rubyists, in which Tute Costa talks about working with Elixir / Phoenix as Ruby / Rails developers. Plug is a fantastic tool, and Phoenix is built on top of it! In my last blog post, we added a way to create sessions and tokens for authentication. However, we didn't actually authenticate anything in our API. This time, we're going to build a Plug that c... This tutorial is just what I needed; I wanted to write a web app using the fitbit api and learn Phoenix while doing it. Update: I've finished a first version. Here's the GitHub Repo and the deployed app I'm just curious.