Need Clarification on POST v3/tokens, as it is raising NotFound while trying to generate a token for a given user and password.

As in v2.0, I am trying to generate a token using v3 too. Below are the steps I have followed

1. Looking into the keystone source at /opt/stack/keystone/tests# vi test_v3.py

       def get_scoped_token(self):
        """Convenience method so that we can test authenticated requests."""
        # FIXME(dolph): should use real auth
        return 'ADMIN'

        r = self.admin_request(
            method='POST',
            path='/v3/tokens',
            body={
                'auth': {
                    'passwordCredentials': {
                        'username': self.user_foo['name'],
                        'password': self.user_foo['password'],
                    },
                    'tenantId': self.tenant_bar['id'],
                },
            })
        return r.body['access']['token']['id']

2. Using the same details from above code, I have formed the below curl command

attempt 1:

    root@Grizzly-machine1:~# curl -i http://10.233.52.240:35357/v3/tokens -X POST -H "Content-Type: application/json" -Her-Agent: python-keystoneclient" -d'{"auth": {"passwordCredentials": {"username": "admin", "password": "Openstack1",},"tenantId": "6903bc1b63d243b7bb3f450130a94bf1",},}'

Attempt 2:

root@Grizzly-machine1:~# curl -i http://10.233.52.240:35357/v3/tokens -X POST -H "Content-Type: application/json" -H "User-Agent: python-keystoneclient" -d'{"auth": {"passwordCredentials": {"username": "admin", "password": "Openstack1",},"tenantId": "6903bc1b63d243b7bb3f450130a94bf1"}}'
HTTP/1.1 400 Bad Request
Vary: X-Auth-Token
Content-Type: application/json
Content-Length: 244
Date: Mon, 04 Feb 2013 19:38:06 GMT

{"error": {"message": "Expecting to find valid JSON in request body. The server could not comply with the request since it is either malformed or otherwise incorrect. The client is assumed to be in error.", "code": 400, "title": "Bad Request"}}root@Grizzly-machine1:~#

While in the case of v2.0 it was like this and it is working fine as below:

root@Grizzly-machine1:~# curl -i http://10.233.52.240:35357/v2.0/tokens -X POST -H "Content-Type: application/json" -H "User-Agent: python-keystoneclient" -d'{"auth":{"passwordCredentials":{"username": "admin", "password": "Openstack1"}}}'
HTTP/1.1 200 OK
Vary: X-Auth-Token
Content-Type: application/json
Date: Mon, 04 Feb 2013 19:35:35 GMT
Transfer-Encoding: chunked

{"access": {"token": {"issued_at": "2013-02-04T19:35:35.554113", "expires": "2013-02-05T19:35:35Z", "id": "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-SbYlw9KCaywtxMiQUfRJJWOXKsIu9Yy1Riizo07Sk-RAKrKTr0vQ5g6EDnK7llRI2ngGyPTn6i7+8aP3UJiuWqVghhOEe7QIg-MA7rlZKny8QMNajcOFK1J2yBJGMoPQM94pK6jJsZO7lAFbWUDVXpeI="}, "serviceCatalog": [], "user": {"username": "admin", "roles_links": [], "id": "3ad4564e8da84714a4803e8d7bb1877f", "roles": [], "name": "admin"}, "metadata": {"is_admin": 0, "roles": []}}}

Can anyone please guide me on how to follow up on this(v3 API POST tokens)

Thanks in advance,
Harika