使用PassportJS,如何将其他表单字段传递给本地身份验证策略？

const express = require('express');
const passport = require('passport');
const LocalStrategy = require('passport-local').Strategy;
const app = express();

app.use(express.urlencoded({ extended: false }));

passport.use(new LocalStrategy(
  function(username, password, done) {
    // 在这里实现您的本地身份验证策略
  }
));

app.post('/login', function(req, res, next) {
  passport.authenticate('local', function(err, user, info) {
    if (err) { return next(err); }
    if (!user) { return res.redirect('/login'); }
    req.logIn(user, function(err) {
      if (err) { return next(err); }
      return res.redirect('/users/' + user.username);
    });
  })(req, res, next);
});

app.post('/login', function(req, res, next) {
  passport.authenticate('local', function(err, user, info) {
    if (err) { return next(err); }
    if (!user) { return res.redirect('/login'); }
    req.logIn(user, function(err) {
      if (err) { return next(err); }
      const email = req.body.email;
      // 在这里处理email字段
      return res.redirect('/users/' + user.username);
    });
  })(req, res, next);
});