title: Cant authenticate Pep Proxy user generated in Horizon when starting Pep proxy
body: <p>I created pep proxy user in Horizon.</p>
  
  <pre><code>Username:
  pep_proxy_4ac90a28a7e0465caf0a9f32998ab47b
  Password:
  ##################
  </code></pre>
  
  <p>And than i changed config.js of PEP proxy:</p>
  
  <pre><code>config.username = 'pep-proxy-aadd736bf4ea4739bd3bfe2cac4178c0';
  config.password = '##################';
  </code></pre>
  
  <p>And when i start pep proxy i get this error:</p>
  
  <pre><code>ERROR: Server - Error in keystone communication {"error": {"message":
   "The request you have made requires authentication.",
   "code": 401, "title": "Unauthorized"}}
  </code></pre>
  
  <p>Can you help me with this.What might be the problem?
  Thanks!</p>