code: func (h *Handler) GetGUISettings(tkn string) (map[string]interface{}, error) {
  	logger := h.logger.Add("method", "GetGUISettings")
  
  	if !h.token.Check(tkn) {
  		logger.Warn("access denied")
  		return nil, ErrAccessDenied
  	}
  
  	retStr, err := data.ReadSetting(h.db.Querier, data.SettingGUI)
  	if err != nil {
  		logger.Error(err.Error())
  		return nil, ErrInternal
  	}
  
  	ret := make(map[string]interface{})
  
  	err = json.Unmarshal([]byte(retStr), &ret)
  	if err != nil {
  		logger.Error(err.Error())
  		return nil, ErrInternal
  	}
  
  	return ret, nil
  }
docs: // GetGUISettings returns gui settings.