code: public ApiSuccessResponse updateContact(String id, UpdateContactData updateContactData) throws ApiException {
          ApiResponse<ApiSuccessResponse> resp = updateContactWithHttpInfo(id, updateContactData);
          return resp.getData();
      }
docs: Update attributes of an existing contact
  
  @param id id of the Contact (required)
  @param updateContactData  (required)
  @return ApiSuccessResponse
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body