public void hasRecordAsync(final CallBack<HashMap> callBack, final Player player) {
        Bukkit.getScheduler().runTaskAsynchronously(plugin, new Runnable() {
            @Override
            public void run() {
                final HashMap<String, Boolean> result = new HashMap<String, Boolean>();

                PreparedStatement q = connection.prepareStatement("SELECT * FROM " + tableName + " WHERE " + rowUsername + " = ? LIMIT 1");

                q.setString(1, player.getName());

                ResultSet resultat = q.executeQuery();
                boolean hasRecord = resultat.next();
                q.close();

                result.put("hasRecord", hasRecord);

                Bukkit.getScheduler().runTask(plugin, new Runnable() {
                        @Override
                        public void run() {
                            callBack.onSuccess(result);
                        }

                });
            }
        });
    }