if len(data) == 0 {
		return nil, fmt.Errorf("empty config data")
	}

	decodedObj, err := runtime.Decode(codecs.UniversalDecoder(), data)
	if err != nil {
		return nil, err
	}
	configuration, ok := decodedObj.(*apiserver.AuthenticationConfiguration)
	if !ok {
		return nil, fmt.Errorf("expected AuthenticationConfiguration, got %T", decodedObj)
	}