text: import { createAppContainer, createSwitchNavigator} from 'react-navigation';
  
  // Pages
  import Login from './pages/Login';
  import List from './pages/List';
  import Book from './pages/Book';
  
  const Routes = createAppContainer(
    createSwitchNavigator({
      Login,
      List,
      Book
    })
  );
  
  export default Routes;