Sets a last login attribute on the user model when they login.
This is based on the templates provided by zonaut.
Building can be done via gradlew build, which will locate a .jar in the the build/libs. Copy/Move it in your keycloak providers folders. Add last_login to the event listeners under "Events"->"Config" in the Keycloak UI. Please take a look at the aforementioned repository for a far more detailed introduction.
This repository will most likely not keep up with the keycloak release cycle. You have been warned.