code: func (api *API) ListUserAgentRules(zoneID string, page int) (*UserAgentRuleListResponse, error) {
  	v := url.Values{}
  	if page <= 0 {
  		page = 1
  	}
  
  	v.Set("page", strconv.Itoa(page))
  	v.Set("per_page", strconv.Itoa(100))
  	query := "?" + v.Encode()
  
  	uri := "/zones/" + zoneID + "/firewall/ua_rules" + query
  	res, err := api.makeRequest("GET", uri, nil)
  	if err != nil {
  		return nil, errors.Wrap(err, errMakeRequestError)
  	}
  
  	response := &UserAgentRuleListResponse{}
  	err = json.Unmarshal(res, &response)
  	if err != nil {
  		return nil, errors.Wrap(err, errUnmarshalError)
  	}
  
  	return response, nil
  }
docs: // ListUserAgentRules retrieves a list of User-Agent Block rules for a given zone ID by page number.
  //
  // API reference: https://api.cloudflare.com/#user-agent-blocking-rules-list-useragent-rules