code: func (api *API) UserAccessRule(accessRuleID string) (*AccessRuleResponse, error) {
  	return api.retrieveAccessRule("/user", accessRuleID)
  }
docs: // UserAccessRule returns the details of a user's account access rule.
  //
  // API reference: https://api.cloudflare.com/#user-level-firewall-access-rule-list-access-rules