Factory methods with and without implicit authorization

gistfile1.js

// Approach one is a synchronous factory method, with explicit authorization

var service = require('service'),
    client = service.createClient('username', 'password');

client.authorize(function(err) {
    client.servers.getServers(function(err, servers) {
        // do stuff with your servers here 
    });
});

// Approach two includes implicit authorization as part of an asynchronous createClient method

var service = require('service');

service.createClient('username', 'password', function(err, client) {
    client.getServers(function(err, servers) {
        // do stuff with your servers here 
    });
});

// A third approach uses a synchronous createClient factory method and implicit on-demand authorization
var server = require('service'),
    client = service.createClient('username', 'password');

// implicitly authorize when the user tries to do something.
client.servers.getServers(function(err, servers) {
    // do stuff with your servers here
});