I cannot see the cookies using fetch in react but I can see the cookies in thunderclient

      <Button
        onClick={async () => {
          console.log("log bth clk");
          const response = await fetch("http://localhost:3000/login", {
            mode: "cors",
            method: "POST",
            headers: {
              "Content-Type": "application/json;charset=utf-8",
            },
            // credentials: "same-origin",
            credentials: "include",
            body: JSON.stringify({ username, password }),
          });
          const headers = response.headers;
          const json = await response.json();
          if (response.status == 400) {
            setErrors(json.errors);
          } else {
            console.log(json, headers, headers.get("a"));
          }
          // console.log(errors, json);
        }}
      >
        Login
      </Button>

          res.cookie('a', 1).status(200).json({ msg: "Pass match", accessToken })