Trying to list S2 objects with awssum

gistfile1.js

var awssum = require('awssum');
var amazon = awssum.load('amazon/amazon');
var S3Service = awssum.load('amazon/s3');
var s3 = new S3Service(config.aws.accessKeyId,
config.aws.secretAccessKey, config.aws.awsAccountID, amazon.US_EAST_1);

var options1 = { BucketName: 'sdcdntest' };

s3.ListObjects(options1, function (err, data) {
  console.dir(data);
});