appsattic/node-awssum — pull request #73 by Techtribe (2012-08-31 08:00:29+00:00)
Title: Security Token implemented

To use IAM roles in EC2 instances it is necessary to use the
credentials with a provided token. I provided it as an option like the
awsAccountId but this option will be implemented in the string that
needs to be signed.

I've tested it, but don't know if you have another way of doing it or optimize it, fine by me! ;)

:D