Improvement?

mysql.js

var Mysql = module.exports = function (conf) {
    var poolConfig = {
        name: 'mysql',
        create: this._createConnection.bind(this),
        destroy: this._destroyConnection,
        max: 10
    };

    this._conf = conf;
    this._pool = pool.Pool(poolConfig);
};

Mysql.prototype._createConnection = function (callback) {
    var config = {
        "hostname": this._conf.get("mysql:hostname"),
        "user": this._conf.get("mysql:user"),
        "password": this._conf.get("mysql:password"),
        "database": this._conf.get("mysql:database")
    };

    new mysql.Database(config).connect(
        function (error) {
            if (error) {
                callback(error, null);
            } else {
                callback(null, this);
            }
        }
    );
};

Mysql.prototype._destroyConnection = function (client) {
    if (client) {
        client.disconnect();
    }
};