def METHOD_NAME():
    list_project_ids = auth.default()
    project_id = list_project_ids[1]
    if isinstance(project_id, str):
        taxonomies = PolicyTagManagerClient().list_taxonomies(
            parent=f"projects/{project_id}/locations/{service_connection.taxonomyLocation}"
        )
        return get_tags(taxonomies)
    if isinstance(project_id, list):
        taxonomies = PolicyTagManagerClient().list_taxonomies(
            parent=f"projects/{project_id[0]}/locations/{service_connection.taxonomyLocation}"
        )
        return get_tags(taxonomies)
    return None