Can new customers be created in QBO API Sandbox - quickbooks

Question

If I create a customer with DisplayName other than "Bob-Smith" it gives an error: Unknown class Customer. Using v3-php-sdk
Fatal error: Uncaught Error: Class 'Customer' not found in /home/novaacoustics/public_html/inc/common.php:2247 Stack trace: #0 /home/novaacoustics/public_html/admin/projects/testQuickbooks.php(52): getCustomerObj(Object(QuickBooksOnline\API\DataService\DataService), 'Peter Sutcliffe') #1 {main} thrown in /home/novaacoustics/public_html/inc/common.php on line 2247
Customer is created fine if I use API Explorer. I already know the new customer doesn't yet exist because the query:
$customerArray = $dataService->Query("select * from Customer where DisplayName='" . $customerName . "'");
returns null.
$realmId = $accessTokenObj->setRealmId('4620816365164449490');
$dataService->updateOAuth2Token($accessTokenObj);
$customerRef = getCustomerObj($dataService, "John Smith");
function getCustomerObj($dataService, $customerName = NULL) {
// $customerName = 'Bob-Smith';
$customerArray = $dataService->Query("select * from Customer where DisplayName='" . $customerName . "'");
$error = $dataService->getLastError();
if ($error) {
logError($error);
} else {
if (is_array($customerArray) && sizeof($customerArray) > 0) {
return current($customerArray);
}
}
// Create Customer
echo "creating customer " .$customerName . getGUID();
$customerRequestObj = Customer::create([
"DisplayName" => $customerName . getGUID()
]);
$customerResponseObj = $dataService->Add($customerRequestObj);
$error = $dataService->getLastError();
if ($error) {
logError($error);
} else {
echo "Created Customer with Id={$customerResponseObj->Id}.\n\n";
return $customerResponseObj;
}
}
The getGUID() I tried removing and same error. Also the refresh_ and access_tokens are fine, OAuth2 working great.

Answer 1

OK solved by adding use QuickBooksOnline\API\Facades\Customer; at top of file where getCustomerObj function is.