gistfile1.js

var openDb = require("../db"),
    bcrypt = require('bcrypt');

module.exports = function(user, callback) {
    user.availablePoints = 10;
    openDb()
        .collection('users')
        .findOne({login: user.login}, function(err, userFromDb){
            
            if(userFromDb){
                callback("there is an user with the same login");
                return;
            }
            
            if(user.password){
                var salt = bcrypt.genSaltSync(10);  
                user.password = bcrypt.hashSync(user.password, salt);    
            }


            openDb()
                .collection('users')
                .insert(user, function(err, user){
                    delete user.password;
                    callback(err,user);
                }); 
        }.bind(this));
};


//usage:

var createUser = require("data/createUser");
createUser({login: "yadayada", password: "blabla"}, ...a callback)