PHP Initialization for Square

Uncaught Error: Class ‘Environment’

include ‘includes.php’;

use Square\SquareClient;

$client = new SquareClient([
‘accessToken’ => getSiteMeta(“SQ_APP_TOKEN”),
‘environment’ => Environment::PRODUCTION,
]);

$body = new \Square\Models\CreateCustomerRequest();
$body->setEmailAddress(‘[email protected]’);

$api_response = $client->getCustomersApi()->createCustomer($body);

if ($api_response->isSuccess()) {
$result = $api_response->getResult();
} else {
$errors = $api_response->getErrors();
}

my autoload is within the includes.php file.

I am getting an error for the environment now.