exports.add_user

exports.add_user = function(login, password, callback) {
    var result;
    MongoClient.connect('mongodb://127.0.0.1:27017/test', function(err, db) {
        var collection = db.collection('users');
        collection.find({
            'login': login
        }, function(err, cursor) {
            cursor.toArray(function(err, items) {
                if (items.length == 0) {
                    collection.insert({
                        login: login,
                        password: password
                    })
                    callback(true);

                } else {
                    callback(false);
                }
            });
        });

        //db.close();
    });
}