User.connected.js

import React from 'react';
import { connect } from 'react-redux';

const User = props => (
    <div>
        {props.user.name}
    </div>
);

function mapStateToProps(state) {
    return {
        user: state.user_reducer.user,
    };
}

export default connect(
    mapStateToProps,
    null
)(User);