code: protected function generate()
      {
          $params = array_keys($this->params);
  
          if ($this->paragraphs) {
              $params[] = $this->paragraphs;
          }
  
          $url = self::API_URL . implode('/', $params);
  
          return $this->conn->request($url);
      }
docs: Generate the text.
  
  @return string