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Typing a username and password on the Apple TV is cumbersome and annoying. For the NSScreencast TV app, I decided to implement a code-based authentication where you can easily log in on another device, type in the code, and have the device be logged in automatically. In this episode we'll go over how to implement this, starting with the server. This episode is done entirely in Ruby using the Sinatra web application framework, but the technique is applicable to any server side technology (including Swift!).