在Laravel Nova工具中使用composer包

I have created a simple demo Laravel Nova Tool to fetch some remote data. I need to fetch it with PHP as it requires authorization, anyway this code inside api.php:

$client = new \GuzzleHttp\Client();

Route::get('/employees', function (Request $request) use ($client) {

     $base_url = 'https://example.com';
     $get_token_url = $base_url . '/auth/access_token?user_id=smthg&user_secret=smthg';

     $request = $client->get($get_token_url);
     $response = $request->getBody();

     return $response;
 });

It doesn't work as I'm getting Class 'GuzzleHttp\Client' not found. I need this dependency inside the Tool. I have installed Guzzle using composer require guzzlehttp/guzzle inside the Tool and composer.json is updated accordingly. It is a namespace issue. My question is how can I correctly namespace it?

You need to remove the slash before GuzzleHttp\Client. Also, the $request parameter gets overridden. In your routes api.php try this instead.

use Illuminate\Http\Request;

$client = new GuzzleHttp\Client();

Route::get('/employees', function (Request $request) use ($client) {
    $base_url = 'https://example.com';
    $get_token_url = $base_url.'/auth/access_token?user_id=smthg&user_secret=smthg';
    $response = $client->get($get_token_url);

    return $response->getBody();
});