How to use @BuildStep and CodeGenProvider for class generation in Quarkus?

[Rootmen]

I am using Quarkus and have written a plugin for authentication. Everything works, but in the resources of my module, I want to generate an interface that contains static constants for authentication, UUIDs for roles, and permissions. I tried to understand @buildstep, but it didn't yield any results; for some reason, even a simple class wasn't generated when using Gizmo.

I also know that there is CodeGenProvider, but I'm not clear on how to use it. Can I ask the community for an example of how this can be implemented? I based my approach on the gRPC extension, which can generate classes, and they are displayed in IDEA.