text: import  { createStackNavigator } from 'react-navigation-stack';
  import { createAppContainer } from 'react-navigation';
  import Login from '../screens/login';
  import Registro from '../screens/register';
  import Home from '../screens/home';
  
  
  const screens = {
      Login: {
          screen: Login,
          navigationOptions: {
              headerShown: false 
          },
      },
      Registro: {
          screen: Registro,
          navigationOptions: {
              headerShown: false  
          },
      },
      Inicio: {
          screen: Home,
          navigationOptions: {
              headerShown: false  
          },
      },
  }
  
  
  const LoginStack = createStackNavigator(screens);
  
  export default createAppContainer(LoginStack);
  
  