title: Django - Does the default Django User model have any unique fields?
body: <p>I know I should be able to find this in the Django documentation but I was having a difficult time. In my application I need to query the default Django User model but I need to do it in a way that it will only ever return one result. For this to happen one of the fields need to be unique.</p>
  
  <p>Does the Django User Model have any unique fields I can use?</p>
  
  <p>Thanks.</p>