🔧 ASP.NET Core JWT Authentication: Setup, Validation, and Best Practices

JWT authentication in ASP.NET Core is a stateless, token-based approach where clients send a signed JWT (usually as a bearer token) and ASP.NET Core validates it on every request to build HttpContext.User. It’s for developers building APIs (REST, SPAs, mobile back ends, microservices) who want scalable authentication without server sessions. The...