code: function Client(accessKey, secretKey, region) {
    if (!(this instanceof Client)) return new Client(accessKey, secretKey, region);
    Object.defineProperty(this, '_sqs',{enumerable: false, configurable: false, writable: false, 
      value: getSQS(accessKey, secretKey, region)});
    Object.defineProperty(this, '_keys',{enumerable: false, configurable: false, writable: false, 
      value: {accessKey: accessKey, secretKey: secretKey, region: region}});
  }
docs: # Client
  
  @param  {string=} accessKey
  @param  {string=} secretKey
  @param  {string=} region
  @return {Client}