index.js

createLiveStream()
 .then((res) => {
 console.log(
 "Created a live stream resource successfully. Below is the Livestream resource"
    );
 console.log(res);
 const liveStreamID = res["liveStreamId"];
 const filePath = "thumbnailImage.jpg";
 addThumbnail(liveStreamID, filePath)
 .then((res) => console.log("Added Thumbnail"))
 .catch((err) =>
 console.log(
 `Encountered following error ${err} while adding thumbnail to live stream`
        )
      );
 })
 .catch((err) =>
    console.log(
 `Encountered following error ${err} while creating live stream resource`
    )
  );