How to implement JWT authentication in NestJS

Authentication is a crucial component of application security, ensuring user verification before granting access and allowing companies to monitor product usage. This tutorial provides a detailed guide on implementing JWT user authentication in a NestJS application, a server-side framework for Node.js known for its scalability and structure, similar to Angular. The process involves setting up a MongoDB database, creating user and authentication modules, and configuring JWT and Passport for secure user authentication. Key steps include creating user schemas, services, and controllers, as well as implementing authentication features using bcrypt for password hashing and JWT for token generation. The tutorial concludes with instructions on testing the application using Postman, enabling users to access protected API routes with an access token.