Does passportjs LocalStrategy allow more parameters than the default username and password?

Question

I'm new to javascript, node,and passportjs. Sorry if this is incorrect. I'd like to use 3 parameters in my passport local strategy: username, email, password. Is it possible? If so how?

According to passportjs: "By default, LocalStrategy expects to find credentials in parameters named username and password. If your site prefers to name these fields differently, options are available to change the defaults." But can i add more paramaters?

I tried this:

 passport.use('local-signup', new LocalStrategy({
        // by default, local strategy uses username and password, we will override with email
        usernameField : 'username',
        emailField : 'email',
        passwordField : 'password',
        passReqToCallback : true // allows us to pass back the entire request to the callback
    },
    function(req, username, email, password, done) {
        console.log("username:"+username + "email:"+email + "pwd:"+password);
    }));

but it logs email as password and password as some function

Answer 1

There is there is the passReqToCallback argument.

passport.use(new LocalStrategy(
 {
   usernameField: 'username',
   passwordField: 'password',
   passReqToCallback: true

 },
function (req, username, password, done) {
  {
    fieldName: req.body.fieldName,
    password: password,
    username: username
  }
}));

Answer 2

I suspect what you are trying to do is save additional information on your user when he signs up.

All your information is store in req.body so you just need to save it in your callback:

passport.use(new LocalStrategy({
    usernameField: 'your_form_username_or_email_fieldname',
    passwordField: 'your_form_password_fieldname'
  },
  function(username, password, done) {
    // ...

    // set the user's credentials
    newUser.username = req.body.username;
    newUser.email = req.body.email;
    newUser.password = newUser.generateHash(password);

    // ....

  }
));

There is no need to change the local strategy as it only needs 2 arguements (the email/username + the password)