gistfile1.js

new models.User().botStatusAccepted(bot_db.get('id')).fetchAll().then(function(users){
    callibration_loop(users.toArray());
}).catch(function(e) { console.error(e); });

var userCounter = 0,
callibration_loop = function(users) {
    var user = users[userCounter++];

    if(bot.friends[user.get('steam_id')] && bot.friends[user.get('steam_id')] == 3) {
        process_user_mmr(user);
    }

    if(userCounter < users.length) {
        setTimeout(function(){ 
            callibration_loop(users);
        }, 3000);
    }
}