code: public List<ApiKey> apiKeys() throws EasyPostException {
        ApiKeys parentKeys = ApiKeys.all();
  
        if (this.getId() == parentKeys.getId()) {
          return parentKeys.getKeys();
        }
  
        for(int i=0; i < parentKeys.children.size(); i++) {
          if(this.getId().equals(parentKeys.children.get(i).getId())) {
            return parentKeys.children.get(i).getKeys();
          }
        }
  
        throw new EasyPostException("Unable to find api key. Please contact support@easypost.com");
      }
docs: api keys