In this chapter, we discussed the following:

• A brief introduction to microservices. We described what microservices are and the benefits of using the microservice architecture style.
• What monolith services are and the various problems with this style of architecting the system.
• Microservice architecture.
• Developing the authentication service and identity service.
• Implementing APIs for issuing and verifying a JWT.
• Implementing CRUD operations for managing identities, such as organizations and people, as APIs in the identity service.
• Handling exceptions.
• The importance of writing test cases, and the test cases for the services that we developed.