How to use the uuidv4.default function in uuidv4

return res.send({
      success: false,
      message: "Wrong ID or email",
    });

  const userExists = await User.findOne({
    pid: req.body.pid,
  });

  if (userExists)
    return res.send({
      success: false,
      message: "Already exists",
    });

  const token = uuid();

  const user = new User({
    pid: req.body.pid,
    email: req.body.email,
    secret: req.body.secret,
    token,
  });

  sendEmail(
    `
      
        
          <h1>You have successfully registered</h1>
          <p>Here is your token: <b>${token}</b></p>
          <p>Use it to login into our <a href="https://t.me/nu_headhunter_bot">Telegram bot</a></p>

app.use((req, res, next) => {
  res.locals.nonce = Buffer.from(uuid()).toString('base64');
  next();
});
app.use(helmet.contentSecurityPolicy({