public static function saveToAchievement(Achievement $achievement)
 {
     $conn = cont\connection::getConnectionObject();
     $con = $conn->getConnection();
     $sql = $con->prepare("INSERT INTO achievement VALUES (?,?,?,? )");
     $sport_id = $achievement->getSportId();
     $achievement_id = $achievement->getAchievementId();
     $description = $achievement->getDescription();
     $date = $achievement->getDate();
     echo $sport_id;
     echo $achievement_id;
     echo $description;
     echo $date;
     $sql->bind_param("ssss", $sport_id, $achievement_id, $description, $date);
     $sql->execute();
     if ($sql->errno) {
         echo "FAILURE!!! " . $sql->error;
     } else {
         echo "Updated {$sql->affected_rows} rows";
     }
 }