"plan_id": "PLAN ID", "quantity": 1, "custom_id": custom_id, "subscriber": { "name": { "given_name": "NAME", }, "email_address": "EMAIL", "address": {"address": "ADDRESS"}, }, "application_context": { "brand_name": "BRAND NAME", "locale": "en-US", "shipping_preference": "NO_SHIPPING", "user_action": "SUBSCRIBE_NOW", "payment_method": { "payer_selected": "PAYPAL", "payee_preferred": "IMMEDIATE_PAYMENT_REQUIRED", }, "return_url": settings.PAYPAL_RETURN_URL, "cancel_url": settings.PAYPAL_CANCEL_URL, }, } What parameters should be set to apply a discount coupon to an existing plan without affecting the original price? The discount should only be applicable for the first transaction, with all subsequent renewals maintaining the original plan price.
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