if i capture the order in commercejs i need to provide ´line_items´ with the item_id as key. But I dont have an item_id (item_xyz0123) i just have an product id (prod_xyz123). is there an way to capture the order without implemting the whole cart logig?

This is my code so far:

res = await commerce.checkout.capture(token.id, {
        line_items: {
           item_0919893978: {quantity: 1} // i dont want this, because i have not a cart 
        customer: {
          firstname: "John",
          lastname: "Doe",
          email: "john.doe@example.com",
        },
        payment: {
          gateway: "test_gateway",
          card: {
            number: "4242424242424242",
            expiry_month: "02",
            expiry_year: "24",
            cvc: "123",
            postal_zip_code: "94107",
          },
        },
      });