Building robust APIs: a comprehensive guide to OAuth2 and TLS integration in REST services — Part 2

In the first article (you can read it here) I defined the objective of this four-article series, described the target architecture that I want to build step by step and start to build the foundation by developing a simple REST service using Spring Boot.

In this article, Part 2 of the series, I will build on that foundation and add the first layer of security, an authentication process based on OAuth2 protocol, to prevent unauthorized access to the resources.