Easypost - async on meteor --production issue.

gistfile1.txt

            var createShippingWrap = Async.wrap(easypost.Shipment.create);
            _(products).each(function(keys,index){
                    qty = parseFloat(keys.qty).toFixed(2);
                    weight += keys.weight * (1);
            });
            parcel.weight = parseFloat(weight);
            try{
                var result = createShippingWrap({
                    to_address:easy.toAddress,
                    from_address:easy.fromAddress,
                    parcel:parcel
                });
                result.buy({rate:result.lowestRate(['USPS'],['Priority'])},
                Meteor.bindEnvironment(function (err,shipment){
                    ShipmentLabelAppended.insert({invoiceId:sess_id,label:shipment.postage_label.label_url});
                }));
            }
            catch(error){
                console.log("error",error);
            }