Node.js - Retrieve user data from Mongodb and display on browser using handlebars

Using mongoose I created a database that stores the info of a user: username, name, email..

Now, I want to display to him his profile. So, first, how do I get the username of the user currently logged in. And, second, how do I get the rest of his data from the database using node.js, and display it on the browser using handlebars?

Here's my schema for user:

var UserSchema = new mongoose.Schema({
    username: {
        type: String,
        index:true
    },
    password: String,
    email: String,
    name: String,
    hasPortfolio: Boolean
});

var User = module.exports = mongoose.model('User', UserSchema); 

Everything works perfectly, from registering and logging in. Now I just want to display his profile, like:

Username: (username)

Name: (name)

E-mail: (email)

So, what should I do?