Using Guzzle 6 in Laravel 5.1

routes.php

<?php
# Install Guzzle by running `composer require guzzlehttp/guzzle`
Route::get('github/{username}', function ($username) {
  $client = new GuzzleHttp\Client();
  $request = $client->get("https://api.github.com/users/{$username}");
  echo $request->getBody();
});