code: func (c Client) AddSubscription(s contract.Subscription) (string, error) {
  	conn := c.Pool.Get()
  	defer conn.Close()
  
  	err := addSubscription(conn, &s)
  	if err != nil {
  		return "", err
  	}
  
  	return s.ID, nil
  }
docs: // ******************************* SUBSCRIPTIONS **********************************