title: Openstack X-auth-token and token
body: <p>I use this shell:</p>
  
  <pre><code>(1)curl -X POST http://localhost:5000/v2.0/tokens -d '{"auth":{"passwordCredentials":{"username": "changzhi", "password":"dddddd"}}}' -H "Content-type: application/json"
  </code></pre>
  
  <p>And in http.log I find a instance:</p>
  
  <pre><code>(2)url -i -X GET http://10.0.3.139:35357/v3/projects -H "User-Agent: python-keystoneclient" -H "Forwarded: for=10.0.3.139;by=python-keystoneclient" -H "X-Auth-Token: 04ef789a010c6f252a9f572347cac345
  </code></pre>
  
  <p>Q:In (1), I can get a long json string. It include token.id . But I don not know what the difference between X-auth-token in (2) and token.id . Could someone tell me the difference ?Thank you ! </p>