App.js

import React, { Component } from 'react'
import User from './User'

class App extends Component {
    render() {
      return (
        <div className="App">
          <h1>App has its own file!</h1>
          <User />
          <User />
          <User />
          <User />
        </div>
      )
    }
  }

  export default App;