In a typical monolithic application, when the user logs in, an HTTP session will be created to hold user-specific information, which will be then used until the session expires. The session will be maintained by a common security component on the server side and all the requests are passed through it. So, it is straightforward to handle user authentication and authorization in a monolithic application.
If we want to follow the same pattern for microservice architecture, we need to implement a security component at every microservice level as well as in a central place (the gateway API) from where all the requests are routed. This is because microservices interact over the network, so the approach of applying security ...
