AppController.swift

enum Navigation {
  case Onboarding
  case Conversations

  var controller:UIViewController {
    switch self {
      case Onboarding:
        return OnboardingController()
        
      case Conversations:
        return ConversationsController()
    }  
  }
  
  var authRequired:bool {
    return controller == AuthRequired   
  }
}

protocol AuthRequired {}