text: import React from 'react';
  import { createAppContainer, createSwitchNavigator } from 'react-navigation';
  
  import MainNavigator from './MainNavigator';
  
  export default createAppContainer(
    createSwitchNavigator({
      // You could add another route here for authentication.
      // Read more at https://reactnavigation.org/docs/en/auth-flow.html
      Main: MainNavigator,
    })
  );
  