MongoDB Node.js isn't only get null in response to getting data
(function() {
  var client, db, listAllData, server;

  db = require('mongodb').Db;
  server = require('mongodb').Server;

  client = new db('images', new server('something.mongolab.com', 111111, {
    username: 'username',
    password: 'password'
  }));

  client.open(function(err, the_client) {
    the_client.collectionNames(function(err, colls) {
      console.log(colls);
    });
  });

}).call(this);