Export-CSV button to allow user to save file to his desktop

Hi, i managed to create the App with SQL connection data display, and i want to add the export-csv button with the ability to allow user to save to his desktop. i know the -filepath works. What’s the good way to take input from user’s about file destination?

Here’s a sample: https://docs.powershelluniversal.com/samples/apps/export-csv-download