title: ASP.Net Identity Logout
body: <p>How to logout an user logged in with the ASP.Net Identity system?</p>
  
  <p>I tried:</p>
  
  <pre><code>Authentication.SignOut();
  </code></pre>
  
  <p>But if I use this and then call an API marked with <code>[Authorize]</code> (adding the token as an header) It still returns me the data (instead of Unauthorized).</p>