Create a payment button

curl --location 'https://api-uat.kushkipagos.com/smartlink/v1/webcheckout' \
--header 'Private-Merchant-Id;' \
--header 'Content-Type: application/json' \
--data-raw '{
    "kind": "webcheckout",
    "contactDetail": {
        "email": "user@example.com",
        "name": "Catalina Fuentes"
    },
    "redirectURL": "https://www.tucomercio.cl/gracias",
    "products": [
        {
            "description": "Producto de ejemplo",
            "name": "Producto Premium",
            "quantity": 1,
            "unitPrice": 10000
        }
    ],
    "paymentConfig": {
        "amount": {
            "subtotalIva0": 10000,
            "subtotalIva": 0,
            "iva": 0,
            "currency": "CLP"
        },
        "paymentMethod": [
            "credit-card",
            "transfer",
            "cash"
        ]
    },
    "additionalInformation": {}
}'