node.js export dynamic data to csv file

I am struggling to write data to a CSV in Node.js.

i tried this code.

       async.auto({
        user: function(cb){
            User.findOne({'memberid': currMemberId}).exec(cb);
        },
        billing : function(cb){
           Payment.find({'memberid' :currMemberId}).exec(cb);  
        },
        trans: function(cb){
           Transaction.find({'id':p.ids}) .exec(cb);
        }
    },function allDone(err, async_data) {
         var data= async_data.trans;
            createCSV = function(data){
                    csv().from(data).to(fs.createWriteStream("c:/temp/sample.csv")); 

           } 

   });

but it doesn't seem to work. can someone please help? I want to fetch some data from database and export this data to csv file.database I fetching data similar to sample data fields plus help me. Thanks