Clojurians Log v2

Hi! For learning purpose, I reimplement the usermanager example from Sean Corfield with Reitit/Integrant instead Compojure/Component. https://github.com/PrestanceDesign/usermanager-reitit-integrant-example/ I am open to any comments or suggestions especially on the parts concerning these libraries (handler.clj, system.clj files). Thx