Azure Mobile Services script to add name and imageUrl properties on insert

profile.insert.js

var req = require('request');

function insert(item, user, request) {
    item.userId = user.userId;
    if (user.userId.indexOf('Twitter:') === 0) {
        var twitterId = user.userId.replace('Twitter:', '');
        req.get('https://api.twitter.com/1/users/show.json?user_id=' + twitterId,
        function(error, result, body) {
           item.imageUrl = '';  
           if (error || result.statusCode != 200) { console.error(error || result); } 
           var json = JSON.parse(body);                      
           if(json.profile_image_url){
                var biggerImg =  json.profile_image_url.replace("normal","bigger");
                item.imageUrl = biggerImg;    
           }
           item.name = json.name;            
           request.execute(); 
        }); 
    }
    else {
        request.execute();
    }
}

This is for demonstration purposes, needs more robust error handling.