var express = require('express')
, app = express()
,BufferApp = require('node-bufferapp');

var bufferapp = new BufferApp({
    clientID : YOUR_APP_CLIENT_ID,
    clientSecret : YOUR_APP_CLIENT_SECRET,
    callbackURL : YOUR_APP_CALLBACK_URL
});

app.get('/auth', function(req, res) {
    // Your user has to authorize your app to use his/her account
    res.redirect(bufferapp.getAuthorizationURI());
});

app.get('YOUR_CALLBACK_PATH', function(req, res) {
    // Extract the code that would have been sent as a query parameter to your callback URL
    var code = req.query.code;
    bufferapp.login(code, function(error, user) {
        // user is an instance of BufferUser which can then be used to make authorized api calls
        user.getInfo(function(err, info) {
            console.log(JSON.stringify(info));
        });
    });
});