To easily test Walkthrough Screen UI:

• Go to SettingsViewController.Swift > internal func signOut()
• In signOut() Comment out the following line of code
  let loginVc = self.viewController(viewControllerClass: LoginViewController.self, from: StoryBoardIdentifiers.main)
• In place of the code we just commented add the following code:
  let loginVc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: StoryBoardIdentifiers.walktrhoughViewController)
• Build and run. When you sign-out from Settings tab, Walkthrough screen is presented hence no need to uninstall and reinstall the app everytime.

This code is purely meant to make testing easy and should NOT be commited.