Microservices with Clojure

Enabling users and roles for authorization

Ideally, the Auth service must be backed by a persistent store to keep the users, roles, and the secret key for the application. For the sake of simplicity of the example, create a sample in-memory database in the helping-hands.auth.persistence namespace, as follows:

(ns helping-hands.auth.persistence  "Persistence Implementation for Auth Service"  (:require [agynamix.roles :as r]            [cheshire.core :as jp])  (:import [java.security MessageDigest]))(defn get-hash  "Creates a MD5 hash of the password"  [creds]  (.. (MessageDigest/getInstance "MD5")      (digest (.getBytes creds "UTF-8"))))(def userdb  ;; Used ony for demonstration  ;; TODO Persist in an external database  (atom   {:secret nil :roles {"hh/superadmin" ...