async def METHOD_NAME(self, session: httpx.ClientSession) -> ContainerRegistryCredentials:
    token_dict = await retry_transient_errors(
        session.post_read_json,
        'http://169.254.169.254/computeMetadata/v1/instance/service-accounts/default/token',
        headers={'Metadata-Flavor': 'Google'},
        timeout=aiohttp.ClientTimeout(total=60),  # type: ignore
    )
    access_token = token_dict['access_token']
    return {'username': 'oauth2accesstoken', 'password': access_token}