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,
  }))