code: func GetMsg(db *sqlx.DB, id uint64) (*Msg, error) {
  	q := `SELECT id, sentence, abotsent
  	      FROM messages
  	      WHERE id=$1`
  	m := &Msg{}
  	if err := db.Get(m, q, id); err != nil {
  		return nil, err
  	}
  	return m, nil
  }
docs: // GetMsg returns a message for a given message ID.