How to use the dockerode/lib/util.parseRepositoryTag function in dockerode

export async function createNewRunner(userId, dockerTag) {
  logger.info(`Creating new instance runner ${dockerTag}`)

  // Verify that dockerode parses the tag to be something sensible before
  // pulling the image. The Docker daemon pulls *all* available tags if one
  // isn't specified. So we verify that the tag isn't empty.
  const tagParse = parseRepositoryTag(dockerTag)
  if (!tagParse.hasOwnProperty('tag')) {
    throw new HttpError(400, 'No tag version specified')
  }

  await createNewInstanceRunner(userId, dockerTag)

  // We won't wait for the promise to resolve because
  // especially with larger images it can take a while to download.
  // Instead, we update the download's status in the database.

  // It should also be noted that this updates the image for all other
  // users too if they use the same tag.

  docker.pull(dockerTag).then(async (stream) => {
    logger.info(`Pulling image ${dockerTag}...`)
    // eslint-disable-next-line no-unused-vars

pullImage(
        imageNameIncludingTag: string,
        authObj: DockerAuthObj | undefined
    ) {
        const self = this

        const parsedTag = dockerodeUtils.parseRepositoryTag(
            imageNameIncludingTag
        )
        const repository = parsedTag.repository
        const tag = parsedTag.tag || 'latest'

        return Promise.resolve()
            .then(function() {
                return self.dockerode.createImage({
                    fromImage: repository,
                    tag: tag,
                    authconfig: authObj,
                })
            })
            .then(function(stream) {
                return new Promise(function(resolve, reject) {
                    let errorMessage = ''