I am creating an AI voice agent to recover abandoned carts for Shopify stores. I am able to get the abandoned cart information from Shopify and store it in a Google Sheet. In the call, I am providing discounts and sending the checkout link to the user via SMS. However, I'm not able to send the checkout link where the provided discount is applied. I want to generate a new checkout link for the customer along with the discount applied, and then send it to the user. How can I do this?