title: Logical Question: How to make a LogOut on iPhone App?
body: <p>I want to have a login / logout on my iPhone App.</p>
  
  <p>I have a AppDelegate which routes by  TTNavigator to my MainView.</p>
  
  <p>My MainView shows a the LoginView with presentModalViewController.</p>
  
  <p>Know my question is, how to do a logout?
  Simply show the LoginView again?</p>