Node module design pattern

I everyone ! I'm using the soap module to create an API. I want to expose specific SOAP method to developers with error and success handling based on a specific webservice.

So i'v created a module wich wrap up soap module. My question is about module.exports best practices and design.

There is many design pattern who can be apply : http://ift.tt/Lc0fEM

function MyModule(options) {
   this.options = option || {};

   //...
};

MyModule.prototype.anApiMethod = function(data, cb) {
   //...
};

module.exports = exports = function(options) {
   return new MyModule(options);
}

It is a good module design. My objective is to pass options as arguments and use the API. What's the trade-off ?

Examples:

var myModule = require('./my-module');
var webservice = myModule({'options1': 'value1'});

webservice.anApiMethod({}, function(err, res){
   //do something
});