The following function retrieves a list of all none-awarded purchases: 
CheckoutController.Instance.GetNoneAwarded();
If the request is successful, this function triggers the OnNoneAwardedSuccess callback with a list of order IDs corresponding to the none-awarded purchases. It is adviced to award the end-users one-by-one by calling Award method with the relevant orderId. Usually, it is best to apply this procedure after the initialization was completed. If the request fails, this function triggers the OnNoneAwardedFailed callback with an ErrorMessage object.