Exercise 6: Spring WebMVC.fn Try to convert the controllers to use the router function with handlers using Spring WebMVC.fn Kotlin DSL for this. Spring documentation https://docs.spring.io/spring-framework/docs/current/reference/html/web.html#webmvc-fn Other useful resources https://docs.spring.io/spring/docs/current/spring-framework-reference/languages.html#kotlin-web https://blog.frankel.ch/spring-boot-migrating-functional/ https://www.baeldung.com/spring-mvc-functional-controllers