Need The Wix Code API to support EXPORTING A Dataset to CSV

I need to use the wix API to export a database to CSV format. I found tutorial on how to do it with wix code:
https://support.wix.com/en/article/corvid-tutorial-importing-and-exporting-collection-data-with-code
BUT, it only lets me create a JSON output format. Can this API be extended to write the output into CSV format? About a year ago you changed the import from JSON to CSV. Why not do the same for export?

Thanks
JD

https://support.wix.com/en/article/exporting-data-from-the-data-manager
https://www.youtube.com/watch?v=jIF_MYz8YKw

Thanks, please allow me to elaborate. This website is a car club of approx 300 members. We have 4 regional directors. They need to be able to retrieve member names and email addresses in order to do mailings. I know about exporting from data manager and of course I can use dashboard and do this for them but they would like ability to do it themselves. However, I do not want them in the Wix Site Dashboard. I have looked at the dashboard in customer management, there is the Contacts which you CAN export but you cannot add a custom field. The Member List would let me add the Region field and I can filter / sort list by region BUT, there is no Export facility.

As a followup, even if I could use wix code to export the fileā€¦ where would the file go? How would the user save it to his PC?