Microservices architecture offers us to deploy multiple services in different servers(hosts) in a private network. When a client request comes to microservices, it should get authenticated before the processing of request. Suppose we have 100 different services in a microservices based application. If client wants to interact with all of them, it will have to pass authentication 100 times. Reducing these many number of calls is one of the motivations to learn 'How To Implement API Gateway Spring Boot In Microservices'. If we have one service which takes care of authentication and also forward the request to concerned service, clients can get the response faster. Yes! We have such type of service which is responsible to do the same. It is