Make sure both Google Cloud Storage and Google Cloud Storage JSON API are enabled for the project
(check from Developers Console -> Api&auth -> APIs)
* Q. What is the identity for GCE?
A. the identity is the developer email which can be obtained from the admin GUI. Its usually something in the form: <myaccountid>@developer.gserviceaccount.com
* Q. What is the credential for GCE
A. the credential is a private key, in pem format. It can be extracted from the p12 keystore that is obtained when creating a "Service Account" (in the GUI: Developers Console(For the project) -> APIs and Auth -> Create New Client ID -> "Service Account"
* Q. How to convert a p12 keystore into a pem format jclouds Google Cloud Storage can handle:
A.
1. Convert the p12 file into pem format (it will ask for the keystore password, which is usually "notasecret"):