def list_keyvaults_sub(access_token, subscription_id):
    '''Lists key vaults belonging to this subscription.

    Args:
        access_token (str): A valid Azure authentication token.
        subscription_id (str): Azure subscription id.

    Returns:
        HTTP response. 200 OK.
    '''
    endpoint = ''.join([get_rm_endpoint(),
                        '/subscriptions/', subscription_id,
                        '/providers/Microsoft.KeyVault/vaults',
                        '?api-version=', KEYVAULT_API])
    return do_get_next(endpoint, access_token)
Lists key vaults belonging to this subscription.

    Args:
        access_token (str): A valid Azure authentication token.
        subscription_id (str): Azure subscription id.

    Returns:
        HTTP response. 200 OK.