Can you help me with with .js error

Unhandled rejection TypeError: Cannot read property 'id' of undefined
    at /home/ubuntu/workspace/context.js:186:132
    at null.<anonymous> (/home/ubuntu/workspace/context.js:141:13)
    at tryCatcher (/home/ubuntu/workspace/node_modules/sequelize/node_modules/bluebird/js/release/util.js:11:23)
    at Promise.module.exports.Promise._settlePromiseFromHandler (/home/ubuntu/workspace/node_modules/sequelize/node_modules/bluebird/js/release/promise.js:489:31)
    at Promise.module.exports.Promise._settlePromise (/home/ubuntu/workspace/node_modules/sequelize/node_modules/bluebird/js/release/promise.js:546:18)
    at Promise.module.exports.Promise._settlePromise0 (/home/ubuntu/workspace/node_modules/sequelize/node_modules/bluebird/js/release/promise.js:591:10)
    at Promise.module.exports.Promise._settlePromises (/home/ubuntu/workspace/node_modules/sequelize/node_modules/bluebird/js/release/promise.js:674:18)
    at Async._drainQueue (/home/ubuntu/workspace/node_modules/sequelize/node_modules/bluebird/js/release/async.js:125:16)
    at Async._drainQueues (/home/ubuntu/workspace/node_modules/sequelize/node_modules/bluebird/js/release/async.js:135:10)
    at Immediate.__dirname.drainQueues [as _onImmediate] (/home/ubuntu/workspace/node_modules/sequelize/node_modules/bluebird/js/release/async.js:16:14)
    at processImmediate [as _immediateCallback] (timers.js:374:17)

    exports.names = ['gift'];
    exports.hidden = false;
    exports.enabled = true;
    exports.matchStart = true;
    exports.handler = function (data) {

    var input = data.message.split(' ');
    var username = input[1];
    var usernameFormatted = S(username).chompLeft('@').s;
    var amount = parseInt(input[2]);
    var user = bot.getUserByName(usernameFormatted.toLowerCase());

    if (!amount || isNaN(amount) || amount < 1) {
        amount = 1;
    }

    if (!username) {
        bot.sendChat('/me usage: .gift @username 50 (gifts 50 points)');
        return;
    }
    else if (!user) {
        bot.sendChat('/me user ' + username + ' was not found.');
    }

   

     getDbUserFromSiteUser(data.user, function (row) {
        if (!row || row.custom_points == 0) {
            bot.sendChat('You do not have any ' + config.customPointName + ' to give,                      @' + data.user.username + '.')
            return;
        } else if (row.custom_points < amount) {
            bot.sendChat('You only have ' + row.custom_points + ' ' +  config.customPointName + ' to give, @' +
                data.user.username + '.');
            return;
        }

        transferCustomPoints(data.user, user, amount);

    });
};

    getDbUserFromSiteUser = function (siteUser, callback) {
        models.User.find({
            where: {site_id: siteUser.id}
        }).then(function (row) {
            callback(row); 
        });

    transferCustomPoints = function (fromUser, toUser, points) {

        // Create them out of thin air!
        if (fromUser === null) {
            fromUser = bot.getSelf();

            models.User.update({custom_points: Sequelize.literal('(custom_points + ' + points + ')')}, {where: {site_id: toUser.id}});
            console.log('[GIFT] ' + fromUser.username + ' awarded ' + points + ' points to ' + toUser.username);
            bot.sendChat(':gift: ' + fromUser.username + ' awarded ' + points + ' ' + config.customPointName + ' to @' +
                toUser.username + ' :gift:');

            return;
        }
        else {
            getDbUserFromSiteUser(fromUser, function (row) {
                if (!row || row.custom_points < points) {
                    console.log('Gift failed');
                    return false;
                }

                // Deduct the points from the sender's balance and add to the recipient
                models.User.update({custom_points: Sequelize.literal('(custom_points - ' + points + ')')}, {where: {site_id: fromUser.id}});
                models.User.update({custom_points: Sequelize.literal('(custom_points + ' + points + ')')}, {where: {site_id: toUser.id}});


                console.log('[GIFT] ' + fromUser.username + ' gave ' + points + ' points to ' + toUser.username);
                bot.sendChat(':gift: @' + fromUser.username + ' gave ' + points + ' ' + config.customPointName + ' to @' +
                    toUser.username + ' :gift:');

            });
        }
    }

  };
};