Reassign a user's product SKU with a different SKU in the same product.
@paramproductId — A product's unique identifier. For more information about products in this version of the API, see Products and SKUs.
@paramskuId — A product SKU's unique identifier. For more information about available SKUs in this version of the API, see Products and SKUs.
@paramuserId — The user's current primary email address. If the user's email address changes, use the new email address in your API requests. Since a userId is subject to change, do not use a userId value as a key for persistent data. This key could break if the current user's email address changes. If the userId is suspended, the license status changes."
any help appreciated.
Thank you