title: Callback URL not approved by Twitter
body: <p>My application built upon <a href="https://mvnrepository.com/artifact/org.springframework.social/spring-social-twitter" rel="noreferrer">spring-social-twitter</a> that enables users to sign in with Twitter has stopped working recently. </p>
  
  <p>I've got an error message as below:</p>
  
  <blockquote>
    <p>Callback URL not approved for this client application. Approved callback URLs can be adjusted in your application settings</p>
  </blockquote>
  
  <p>Note: I'm using Spring Social Twitter version 1.1.2.RELEASE. And if you use Spring Social Twitter version 1.1.0.RELEASE, you might get a slightly different error message as below:</p>
  
  <blockquote>
    <p>POST request for "<a href="https://api.twitter.com/oauth/request_token" rel="noreferrer">https://api.twitter.com/oauth/request_token</a>" resulted in 403 (Forbidden); invoking error handler</p>
  </blockquote>