title: How to forget authorization credentials?
body: <p>When you ask for authorization for a certain MVC Action like this:</p>
  
  <pre><code>    [Authorize(Roles = @"Domain\Groupname")]
      public string SomeAction()
      {
          return "ok";
      }
  </code></pre>
  
  <p>And the user is NOT a member, the user is asked for valid credentials. This is great functionality that I want to keep.</p>
  
  <p>However.. when these given credentials are valid, these credentials will be used for the entire application until the user of these given credentials changes his password!</p>
  
  <p>How do I force the application or browser to forget the given credentials? Is there some method to apply an 'This is not me..' button? </p>
  
  <p>To my surprise the application will remember these credentials even after a restart of the IIS application AND after a whole reset of the client's browser to factory defaults (?!)</p>