func newDynamicRequestHeaderController(client kubernetes.Interface) (*DynamicRequestHeaderController, error) {
	requestHeaderCAController, err := dynamiccertificates.NewDynamicCAFromConfigMapController(
		"client-ca",
		authenticationConfigMapNamespace,
		authenticationConfigMapName,
		"requestheader-client-ca-file",
		client)
	if err != nil {

}

var _ CAContentProvider = &ConfigMapCAController{}
var _ ControllerRunner = &ConfigMapCAController{}

// NewDynamicCAFromConfigMapController returns a CAContentProvider based on a configmap that automatically reloads content.
// It is near-realtime via an informer.
func NewDynamicCAFromConfigMapController(purpose, namespace, name, key string, kubeClient kubernetes.Interface) (*ConfigMapCAController, error) {
	if len(purpose) == 0 {