Biztalk gets location in C #

I configured the receive port using C #. Below is the code, and everything is in order. But I need to configure the authentication tab and specify the USERNAME and PASSWORD data. Can anyone direct me to this.

ReceivePort myreceivePort = app.AddNewReceivePort (false);

        //Note that if you dont set the name property for the receieve port, 
        //it will create a new receive location and add it to the receive       //port.
        myreceivePort.Name = "MyPort";


        //Create a new receive location and add it to the receive port
        ReceiveLocation myreceiveLocation = myreceivePort.AddNewReceiveLocation();


        foreach(ReceiveHandler handler in root.ReceiveHandlers)
        {
           if(handler.TransportType.Name == "FILE")
           {
              myreceiveLocation.ReceiveHandler = handler;
              break;
           }
        }

        //Associate a transport protocol and URI with the receive location.
        foreach (ProtocolType protocol in root.ProtocolTypes)
        {
           if(protocol.Name == "FILE")
           {
              myreceiveLocation.TransportType =  protocol;

              break;
           }
        }
        myreceiveLocation.CustomData
        // new BizTalk application

        myreceiveLocation.Address = "C:\\test\\*.txt";
        //Assign the first receive pipeline found to process the message.
        foreach(Pipeline pipeline in root.Pipelines)
        {
           if(pipeline.Type == PipelineType.Receive)
           {
              myreceiveLocation.ReceivePipeline = pipeline;
              break;
           }
        }

        //Enable the receive location.
        myreceiveLocation.Enable = true;
        myreceiveLocation.FragmentMessages = Fragmentation.Yes;//optional property
        myreceiveLocation.ServiceWindowEnabled = false; //optional pr