Demonstrating a simple authentication system using Node.js, Express.js, and MongoDB. It includes APIs for user registration, login, fetching user details, and updating user details, all protected by JWT-based authentication. What is JWT?JWT stands for JSON Web Token. It is an open standard that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. This information can be verified and trusted because it is digitally signed. JWTs can be si ...