title: Is it insecure to use 'localhost' as a callback URL in Auth0?
body: <p>Should I avoid using <code>http://localhost:3000</code> as a callback url in Auth0 (particularly in a <code>dev</code> or <code>stage</code> environment)?</p>
  
  <p>I understand that there is a potential for attacks using a POST http request utilizing the localhost url. However, is that a consideration I would need to make for a development or stage environment?</p>