与Passport-local使用电子邮件。先前的帮助不工作

So I'm using passport-local and express to handle user log-in. So far I have been able to get a successful log-in while using usernames, but usernames are hard to remember and I personally don't think they should be used for handling users, so I tried modifying the sample Strategy provided on the passport-local page to confirm users via email, but the code doesn't work.So I'm using passport-local and express to hand