text: import React from 'react';
  import { createStackNavigator, createAppContainer } from 'react-navigation';
  import LoadingScreen from './screens/LoadingScreen';
  import HomeScreen from './screens/HomeScreen';
  import SignInScreen from './screens/SignInScreen';
  import SignUpScreen from './screens/SignUpScreen';
  import ProfileScreen from './screens/ProfileScreen';
  import MyRecordsScreen from './screens/MyRecordsScreen';
  import Icon from './screens/Icon';
  import Account from './screens/Account';
  import ResetPassword from './screens/ResetPassword';
  import PrivacyPolicy from './screens/PrivacyPolicy'
  
  const navigator = createStackNavigator({
    Loading: LoadingScreen,
    SignIn: SignInScreen,
    Home: HomeScreen,
    SignUp: SignUpScreen,
    Profile: ProfileScreen,
    MyRecords: MyRecordsScreen,
    Icon: Icon,
    Account: Account,
    ResetPassword: ResetPassword,
    PrivacyPolicy: PrivacyPolicy
  },
    {
      defaultNavigationOptions: {
        headerMode: 'none',
        headerVisible: false,
        header: null,
      },
      navigationOptions: {
        headerMode: 'none',
        headerVisible: false,
        header: null,
      }
    },
  );
  
  const App = createAppContainer(navigator);
  
  export default () => {
    return (<App />)
  }