title: Disable back navigation for single ViewController
body: <p>I have the following VCs:</p>
  
  <p><a href="https://i.stack.imgur.com/sPEIv.jpg" rel="nofollow"><img src="https://i.stack.imgur.com/sPEIv.jpg" alt="Interface Builder"></a></p>
  
  <p>VC in the center is "Login" screen, it just redirects user to the tab bar controller, if user is authorized.</p>
  
  <p>I want to disable going back to Login VC from any VC within TabBarController (with "back" button and swipe).</p>
  
  <p>How to achieve this?</p>