code: func (api UsersAPI) GetKeyStoreKey(w http.ResponseWriter, r *http.Request) {
  	username := mux.Vars(r)["username"]
  	globalid := context.Get(r, "client_id").(string)
  	label := mux.Vars(r)["label"]
  
  	mgr := keystore.NewManager(r)
  
  	key, err := mgr.GetKeyStoreKey(username, globalid, label)
  	if db.IsNotFound(err) {
  		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
  		return
  	}
  	if err != nil {
  		log.Error("Failed to get keystore key: ", err)
  		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
  		return
  	}
  
  	w.Header().Set("Content-Type", "application/json")
  	json.NewEncoder(w).Encode(key)
  }
docs: // GetKeyStoreKey returns all specific publickey written to the user by an organizaton