title: backed up mongo and now I'm an receiving authorization error
body: <p>I am running a very simple MongoDB install on Windows 10 and interacting with it via Node. I just used mongodump to create a backup, and now I'm getting this when I try to run the app I've been working on: </p>
  
  <pre><code>MongoError: not authorized on [db] to execute command ...
  </code></pre>
  
  <p>I've just been using the default config settings (authorization not enabled in the mongo.cfg) so I have no idea why the authorization suddenly wouldn't work. Any ideas?</p>