Why do I get empty objects in response to my http request?

Why do I get empty objects in response to my http request in this Spring Boot application? In case you need it, here’s the project’s repo

This is not a forum for general questions, but only for Hibernate specific ones. Formulate your question in a way where you ask something specific about Hibernate if you want help from the community in this forum. Otherwise, go to StackOverflow or the Spring Boot forum where you can ask general questions.

It was absent getters, by the way