code: public function destroy($sessionId)
      {
          // delete the record associated with this id
          $sql = "DELETE FROM $this->table WHERE $this->idCol = :id";
  
          try {
              $stmt = $this->pdo->prepare($sql);
              $stmt->bindParam(':id', $sessionId, \PDO::PARAM_STR);
              $stmt->execute();
          } catch (\PDOException $e) {
              $this->rollback();
  
              throw $e;
          }
  
          return true;
      }
docs: {@inheritdoc}