code: func (c *Client) EventCount() (count int, err error) {
  	conn := c.Pool.Get()
  	defer conn.Close()
  
  	count, err = redis.Int(conn.Do("ZCARD", db.EventsCollection))
  	if err != nil {
  		return 0, err
  	}
  
  	return count, nil
  }
docs: // Get the number of events in Core Data