content: // depends on redux
  import React, { Component } from 'react';
  import { View, Text } from 'react-native';
  import { connect } from 'react-redux';
  import PropTypes from 'prop-types';
  import { 
    emailChanged, passwordChanged, loginUser 
  } from '../actions';
  import { Card, CardSection, Input, Button, Spinner } from './common';
  
  class LogoutForm extends Component {
  
    constructor() {
      super();    
    }
  
    render() {
      return (
        <View>
          <Text>Log out</Text>
        </View>
      );
    }
  
  }
  
  LogoutForm.propTypes = {
    navigation: PropTypes.object.isRequired,
  };
  LogoutForm.navigationOptions = {
    title: 'App Sign Out'
  };
  
  export default connect(null)(LogoutForm);