Dynamically getting the dimensions and measures in a newly created hypercube in qlik sense extension

[rahuljattennavar]

Hi guys, So, I'm creating a new extension and I want the dimension and measures to be rendered into my newly created hypercube. Right now I have added the dimensions and measures statically,  I want it to be rendered dynamically .The below is the code

app.createCube({

    qDimensions : [{

        qDef : {

            qFieldDefs : ["Position"] //dimension value

        }

    // }, 

    // {

    //  qDef : {

    //      qFieldDefs : ["LastName"]

    //  }

    }],

    qMeasures : [{

        qDef : {

            qDef : "Avg(Age)"  //Measure

        }

    }],

    qInitialDataFetch : [{

        qTop : 0,

        qLeft : 0,

        qHeight : 20,

        qWidth : 20

    }]

}, function(reply,app) {

    console.log(layout,app);

    var data = [];

    $.each(reply.qHyperCube.qDataPages[0].qMatrix, function(index, value){

        if(!this[0].qIsEmpty){

            data.push(this[0].qText);

        }

        // console.log(data)

    })

})

Thank you guys in advance.