.js

    async resize(size, path) {
      try {
        ...
        const Bucket = process.env.BUCKET
        const streamResize = sharp()
          .resize(width, height)
          .toFormat('png')

        const readStream = s3Handler.readStream({ Bucket, Key })
        const { writeStream, uploaded } = s3Handler.writeStream({ Bucket, Key: newKey })

        readStream
          .pipe(streamResize)
          .pipe(writeStream)

          await uploaded
          return newKey
      }
    }