curl -X POST "https://api.tosspayments.com/v1/payments/tkjik20251208154033XvLL5/cancel" \ -H "Authorization: Basic" \ -H "Idempotency-Key: " \ -H "Content-Type: application/json" \ -d '{"cancelReason":"CHANGE_PAYMENT_METHOD"}'
취소시 사용한 curl 정보