Came to know about Nuxeo Automation Client provide About the multi-tenant User Managment.
To use the REST API of Nuxeo, you should use Nuxeo Automation Client, see http://doc.nuxeo.com/display/NXDOC/Using+Nuxeo+Automation+Client The Multi Tenant addon provides only 2 operations, one to create an user in a specific tenant, another one to c...