This post will go over how to include JWT (Json Web Token) authentication into an existing Lumen API. JWT is a standard for API authentication that is URL safe, and can pass manage small amounts of state too. You may have to edit more files depending on what state your API is already in but if you have an existing API you should be able to manage this. It is assumed that the existing api is just the result of creating a basic Lumen project with the composer tool.