Updating Powerpoint Charts linked to Password Protected Excel File - excel

Question

I ve got a password protected excel workbook and a powerpoint presentation which has many charts linked to this workbook. What I am trying to do is updating all charts in the presentation without entring a password. I tried to reach data via ChartData object but couldn't find out how to access workbook with a password written in the code. I had also tried creating an excel object however this time after setting workbook as unprotected I couldn't define the code that refresh links between charts and data.
I appreciate any effort that helps me to solve this problem.
I had found this code from this link and I inserted myChart.ChartData.Workbook.UnProtect Password:="1234", writeResPassword:="1234", ReadOnly:=False, Updatelinks:=3. Unfortunately it is still asking for password.
Sub update2()
Dim myPresentation As PowerPoint.Presentation
Dim sld As PowerPoint.Slide
Dim shp As PowerPoint.Shape
Dim myChart As PowerPoint.Chart
Dim Wb As Object
Dim App As Object
Set myPresentation = ActivePresentation
For Each sld In myPresentation.Slides
For Each shp In sld.Shapes
If shp.HasChart Then
Set myChart = shp.Chart
myChart.ChartData.Activate
myChart.Refresh
Set Wb = myChart.ChartData.Workbook
Set App = Wb.Application
Wb.Close (0)
End If
Next
Next
App.Quit
End Sub
I think as it gets to the line myChart.ChartData.Activate then password input box is triggered and from that point the rest of the code doesnt work.
I assume that when we reach chart data through powerpoint it runs an explicit app. If so how I can pass the password dialog in that app.