Why does this scrape return undefined?

When I run this code I get undefined but it is clear that the ski and product_id are in the value form.

I want:

value="BTdtb4CBz3uSJ2qv"

value="adi-ss20-042"

but I get "undefined"

class TresBien {
      async scrapeRaffleInfo() {
        // scrape the form_key and sku values
        const response = await axios(
          "https://tres-bien.com/adidas-yeezy-boost-380-mist-fx9764-ss20"
        );
        console.log("response: ", response);
        const html = await response.data;

        const $ = cheerio.load(html);
        const res = $('input[name="sku"]').val();
        const ans = $('input[name="form_key"]').val();
        console.log(res && ans);
      }
    }

    const main = async () => {
      const tb = new TresBien(
        "https://tres-bien.com/adidas-yeezy-700-v3-alvah-h67799-ss20"
      );
      let checkoutSucc = await tb.scrapeRaffleInfo();
      if (checkoutSucc) {
        Logger.logEventSuccess("Raffle successfully entered");
      }
    };

    main();