arosen@OpenStackController:/opt/stack/nova$ nova help | grep no_cache
usage: nova [--debug] [--no_cache] [--timings] [--os_username OS_USERNAME]
  --no_cache            Don't use the auth token cache.
arosen@OpenStackController:/opt/stack/nova$ nova list --no_cache
usage: nova [--debug] [--no_cache] [--timings] [--os_username OS_USERNAME]
            [--os_password OS_PASSWORD] [--os_tenant_name OS_TENANT_NAME]
            [--os_auth_url OS_AUTH_URL] [--os_region_name OS_REGION_NAME]
            [--service_type SERVICE_TYPE] [--service_name SERVICE_NAME]
            [--volume_service_name VOLUME_SERVICE_NAME]
            [--endpoint_type ENDPOINT_TYPE]
            [--os_compute_api_version OS_COMPUTE_API_VERSION]
            [--username USERNAME] [--region_name REGION_NAME]
            [--apikey APIKEY] [--projectid PROJECTID] [--url URL]
            [--bypass_url BYPASS_URL]
            <subcommand> ...
error: unrecognized arguments: --no_cache
Try 'nova help ' for more information.