Updating Woocommerce Variation Products Prices Via Zoho CRM

I can update product prices with this flow:

But I can't update variant products. I got a code from Zoho for this, but I couldn't get it to work. It needs to find the product in the CRM from the SKU field and update the variation with the price there.

void updateVariableProductInWoocommerce(string product_id, string variation_id, string regular_price, string sale_price, string stock_quantity)
{
url = "<Your Base URL>/wp-json/wc/v3/products/" + product_id + "/variations/" + variation_id;
params = Map();
params.put("regular_price",regular_price);
params.put("sale_price",sale_price);
params.put("stock_quantity",stock_quantity);
response = invokeurl
[
url :url
type :PUT
parameters:params.toString()
connection:"<Connection Link Name of Woocommerce>"
content-type:"application/json"
];
info response;
}