[keycloak-user] Updating the Database Schema

Good morning- I was attempting to make some customizations to the Keycloak schema and the README for doing so here<https://github.com/keycloak/keycloak/blob/master/misc/UpdatingDat... shows files that no longer exist in the repo. Does anyone know how to make modifications to the DB schema based on the current structure of the project? Thank you, Keith Carlton