def list_media_services(access_token, subscription_id):
    '''List the media services in a subscription.

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

    Returns:
        HTTP response. JSON body.
    '''
    endpoint = ''.join([get_rm_endpoint(),
                        '/subscriptions/', subscription_id,
                        '/providers/microsoft.media/mediaservices?api-version=', MEDIA_API])
    return do_get(endpoint, access_token)
List the media services in a subscription.

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

    Returns:
        HTTP response. JSON body.