public function save(Player $player)
 {
     $query = "\n            INSERT INTO players (username, password)\n            VALUES (?, ?)\n        ";
     $params = [$player->getUsername(), $player->getPassword()];
     if ($player->getId()) {
         $query = "UPDATE players SET username = ?, password = ? WHERE id = ?";
         $params[] = $player->getId();
     }
     $this->db->query($query, $params);
     return $this->db->rows() > 0;
 }