Derive macro for [railway-api](https://crates.io/crates/railway-api).
This crate is part of [railway-backend](https://gitlab.com/schmiddi-on-mobile/railway-backend).
You can find a high-level documentation of railway-backend [here](https://gitlab.com/schmiddi-on-mobile/railway-backend/-/tree/main/docs?ref_type=heads).