Po prostu podaj wymagane pola modelu jako opcję.
var mongoose = require('mongoose'),
passportLocalMongoose = require('passport-local-mongoose');
var userSchema = mongoose.Schema;
var User = new userSchema({
username: ...,
admin: ...,
// Configure other schema fields
});
User.plugin(passportLocalMongoose, {
selectFields : 'username admin etc' //Space seperate the required fields
);
A podczas rejestracji
// user_details contains all information required
// for registration such as username, password, admin, etc.
User.register(new User(user_details), user_password, cb);