code: func (a *AuthServer) NewWatcher(ctx context.Context, watch services.Watch) (services.Watcher, error) {
  	return a.GetCache().NewWatcher(ctx, watch)
  }
docs: // NewWatcher returns a new event watcher. In case of an auth server
  // this watcher will return events as seen by the auth server's
  // in memory cache, not the backend.