“At [SpreeConf and Ruby on Ales], I gave a talk about Rails Engines. In this talk, I covered a lot of the lessons that I learned about developing an engine, and the one of them that I would like to expand on today is about how an engine should deal with authentication. Put simply, the engine should not deal with authentication at all. You can stop reading now, this blog post is over and you’ve learned everything you’re going to learn. Go forth and develop engines without authentication. Thanks for reading!”