code: func (api UsersAPI) ListUserRegistry(w http.ResponseWriter, r *http.Request) {
  	username := mux.Vars(r)["username"]
  
  	mgr := registry.NewManager(r)
  	registryEntries, err := mgr.ListRegistryEntries(username, "")
  	if err != nil {
  		log.Error(err.Error())
  		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
  		return
  	}
  	w.Header().Set("Content-Type", "application/json")
  	json.NewEncoder(w).Encode(registryEntries)
  }
docs: // ListUserRegistry is the handler for GET /users/{username}/registry
  // Lists the Registry entries