anchor.diff:  
   ;; Simple ring handler. This also, can be a compojure routes handler
   ;; or any other while it be compatible with ring middlewares.
  -
   (defn handler
     [request]
     (if (authenticated? request)
  
positive.code: Introduction
  ------------
  
  _buddy_ is a simple authentication, authorization and signing library for clojure.
  It's designed with simplicity in mind and high level framework agnostic
  (it only depends on ring) following the principle of single responsability.
  
  
negative.code: Session
  ^^^^^^^
  
  Session authenticated backend has the simplest implementation comparing it with
  others, but it requires session middleware for properly work.
  
  Unlike the previous auth backend, this does not requires authfn, because it relies on
  `:identity` key on session  and trust it. If a session contains the `:identity` key with
  