Работа с composer

Добрый день!
Подскажите пожалуйста, вот установлены библиотеки глобально:

agromirooo@bitrix268:~$ composer show
doctrine/inflector v1.2.0 Common String Manipulations with regard ...
guzzlehttp/guzzle 6.3.0 Guzzle is a PHP HTTP client library
guzzlehttp/promises v1.3.1 Guzzle promises library
guzzlehttp/psr7 1.4.2 PSR-7 message implementation that also p...
illuminate/contracts v5.5.39 The Illuminate Contracts package.
illuminate/support v5.5.39 The Illuminate Support package.
irazasyed/telegram-bot-sdk v3.0.0 The Unofficial Telegram Bot API PHP SDK
league/event 2.1.2 Event package
nesbot/carbon 1.24.2 A simple API extension for DateTime.
psr/container 1.0.0 Common Container Interface (PHP FIG PSR-11)
psr/http-message 1.0.1 Common interface for HTTP messages
psr/simple-cache 1.0.1 Common interfaces for simple caching
symfony/event-dispatcher v2.8.36 Symfony EventDispatcher Component
symfony/polyfill-mbstring v1.7.0 Symfony polyfill for the Mbstring extension
symfony/translation v3.4.6 Symfony Translation Component

Что теперь делать в локальном проекте?
Пытаюсь вызывать класс Client, пишет ошибку:
---------------------

Код (Text):

1. <?php
2.  
3. //require 'vendor/autoload.php';
4. use GuzzleHttp\Client;
5. $client = new Client();
6. /*array(
7.     // Base URI is used with relative requests
8.     'base_uri' => 'http://httpbin.org',
9.     // You can set any number of default request options.
10.     'timeout'  => 2.0,
11. ));*/
12. ?>

---------------------
PHP Fatal error: Uncaught Error: Class 'Client' not found in /home/a/agromirooo/public_html/tlgm_bot/index.php:7
Stack trace:
#0 {main}
thrown in /home/a/agromirooo/public_html/tlgm_bot/index.php on line 7