@accounts/express-session/src/utils/get-user-agent.ts

Stores the access and refresh tokens as part of the session (`express-session`), this way auth flow could be based on it.

import type { Request } from 'express';

export const getUserAgent = (req: Request) => {
  let userAgent: string = (req.headers['user-agent'] as string) || '';
  if (req.headers['x-ucbrowser-ua']) {
    // special case of UC Browser
    userAgent = req.headers['x-ucbrowser-ua'] as string;
  }
  return userAgent;
};