title: Laravel 5: Custom abort() message
body: <p>Using Laravel 5, I want to send a custom <code>abort()</code> message.<br>
  For example, if the user doesn't have the required permissions for an action,<br>
  I'd like to <code>abort(401, "User can't perform this actions")</code>.<br>
  Currently, when I do so, the response text is HTML page and not the message.<br>
  How can I return only the message?  </p>
  
  <p><strong>Note:</strong> I don't want to pass a different view, but only the custom message.</p>