text: import 'react-native-gesture-handler';
  import { createAppContainer, createSwitchNavigator } from 'react-navigation';
  
  import SignIn from '~/pages/SignIn';
  import SignUp from '~/pages/SignUp';
  
  export default createAppContainer(
    createSwitchNavigator({
      SignIn,
      SignUp,
    }),
  )
  