title: If I have defined the [Authorize] attribute at class level is it possible to skip authorisation for one of the actions?
body: <p>I have a base controller class which I want to define <code>[Authorize]</code> on as it will be used by every controller in my application. My login screen also uses this base controller but I want to skip authorisation on the login screen so that users can actually log in.</p>
  
  <p>Is it possible to override <code>OnAuthorization</code> in just my login controller and pass through whether they are authorised or not?</p>