func LookupConfig(s config.Config, transport http.RoundTripper, closeRespFn func(io.ReadCloser), serverRegion string) (c Config, err error) {
	openIDClientTransport := http.DefaultTransport
	if transport != nil {
		openIDClientTransport = transport
	}
	c = Config{
		Enabled:            false,
		arnProviderCfgsMap: map[arn.ARN]*providerCfg{},
		ProviderCfgs:       map[string]*providerCfg{},