Attempt to create the user on the cloud node.

def create_cloud_user(cfg, args):
    """Attempt to create the user on the cloud node."""
    url = cfg['api_server'] + "admin/add-user"
    params = {'user_email': args.user_email, 'user_name': args.user_name,
              'user_role': args.user_role, 'email': cfg['email'],
              'api_key': cfg['api_key']}
    headers = {'Content-Type': 'application/json'}
    response = requests.post(url, data=json.dumps(params),
                             headers=headers)
    if response.status_code not in range(200, 299):
        raise Exception("Errors contacting the cloud node: %s" % (response.content))
    loaded = json.loads(response.content)
    return loaded