问express-ntlm返回错误的用户

EN

const ntlm = require('express-ntlm');

module.exports = app => {

  app.use(
    ntlm({
      debug: function() {
        var args = Array.prototype.slice.apply(arguments);
        console.log.apply(null, args);
      },
      domain: 'MS',
      domaincontroller: 'ldap://something.com'
    })
  );
app.post('/get-user-details/', (req, res) => {
console.log(req.ntlm.UserName); //Returns correct user most of the time, but sometimes it returns different person who open site at the same time
});