title: mongodb 3 MONGODB-CR authentication
body: <p>Is it possibile to create Users with the old MONGODB-CR User authentication in mongo 3.0.2?</p>
  
  <p>Actually I've only one User created by default with the new SCRAM-SHA-1 credential authentication.</p>
  
  <pre><code> db.system.users.find({ "credentials.SCRAM-SHA-1" : { $exists: true}}, { user: 1, db: 1})
  
  { "_id" : "admin.siteUserAdmin", "user" : "siteUserAdmin", "db" : "admin" }
  </code></pre>
  
  <p>and:</p>
  
  <pre><code> db.system.users.find({ "credentials.MONGODB-CR" : { $exists: true}}, { user: 1, db: 1})
  </code></pre>
  
  <p>is empty.</p>