Creates a new order in the system. Even though an order is created successfully, the response can return an array named "validationErrors" containing errors that will need to be addressed. Note that Basic Authentication is required for all requests as such, make sure to provide the Authorization header with a valid value. Should you choose to provide a callback url by using the 'WebhookUrl' field, we will send a HTTP POST request to that URL with a JSON payload containing the OrderId when the order is either delivered or cancelled.