How to use the uuid/v4.v4 function in uuid

async function generateDownloadLinks(ctx, userID) {
  const {
    connectors: {
      url: { BASE_URL },
      secrets,
    },
  } = ctx;

  // Generate a token for the download link.
  const token = await secrets.jwt.sign(
    { user: userID },
    { jwtid: uuid.v4(), expiresIn: '1d', subject: DOWNLOAD_LINK_SUBJECT }
  );

  // Generate the url that a user can land on.
  const downloadLandingURL = new URL('account/download', BASE_URL);
  downloadLandingURL.hash = token;

  // Generate the url that the API calls to download the actual zip.
  const downloadFileURL = new URL('api/v1/account/download', BASE_URL);
  downloadFileURL.searchParams.set('token', token);

  return {
    downloadLandingURL: downloadLandingURL.href,
    downloadFileURL: downloadFileURL.href,
  };
}

constructor(ctx) {
    // Generate a new context id for the request if the parent doesn't provide
    // one.
    this.id = ctx.id || uuid.v4();

    // Attach a logger or create one.
    this.log = ctx.log || createLogger('graph:context', this.id);

    // Load the current logged in user to `user`, otherwise this will be null.
    this.user = get(ctx, 'user');

    // Attach the connectors.
    this.connectors = connectors;

    // Create the loaders.
    this.loaders = createLazyContextLoader(this, loaders);

    // Create the mutators.
    this.mutators = createLazyContextLoader(this, mutators);

socket.on('nextSong_response', (songdata) => {
            if (FETCHING) {
                FETCHING = false;
                if (djtimer) {
                    clearTimeout(djtimer);
                }
                djtimer = undefined;
                let dj = directory.getuser(socket.id);
                if (songdata) {
                    let newguy = songdata;
                    newguy.PlaybackID = uuid.v4();
                    newguy.DJ = dj;
                    let now = new Date().getTime();
                    currentVideo = { Info: newguy, StartTime: now, EndTime: now + newguy.Duration };
                    socketManager.emit('song_start', { currVid: currentVideo });
                } else {
                    remove_from_queue(dj.Username, (err) => {
                        playNextSong(() => {
                            console.log('DJ did not have a valid song. Skipping....');
                        });
                    });
                }
            }

        });