title: Can't insert into newly created mongolab db
body: <p>I'm having problems inserting documents into a mongoLab instance.</p>
  
  <p>I'm connecting to the instance using this command :</p>
  
  <pre class="lang-java prettyprint-override"><code>MongoClient client = new MongoClient(new MongoClientURI(uri));
  </code></pre>
  
  <p>with <code>uri</code> that look like this :</p>
  
  <pre><code>mongodb://heroku_app1234:random_password@ds029017.mongolab.com:29017/heroku_app1234
  </code></pre>
  
  <p>the user <code>heroku_app1234</code> has the status <code>readOnly</code> to <code>false</code></p>
  
  <p>and inserting my document like this :</p>
  
  <pre class="lang-java prettyprint-override"><code>Jongo jongo = new Jongo(client.getDB("myDb"));
  MongoCollection collection = jongo.getCollection("myCollection");
  collection.save(someBean);
  client.close();
  </code></pre>
  
  <p>and the server crash with this exception :</p>
  
  <pre><code>Caused by: com.mongodb.WriteConcernException: { "serverUsed" : "ds029017.mongolab.com:29017" , "err" : "not authorized for insert on myDb.myCollection" , "code" : 16544 , "n" : 0 , "lastOp" : { "$ts" : 0 , "$inc" : 0} , "connectionId" : 21382 , "ok" : 1.0} 
  </code></pre>