As developers, we use authorization libraries almost every day. Whether it's a web application, an API, or an internal tool, we often rely on packages that decide who can do what. But I realized I had never actually built one. So instead of using an existing library, I decided to build my own Role-Based Access Control (RBAC) library in Go using only the standard library. This project eventually became GateKeeper v1.0.0. Why I Built One As a beginner in backend develop...