Need help with VIES check implementation

We want to validate EU VAT numbers using the EU’s VIES API service in a checkout form.
I found these two (first, second) useful guides, but don’t actually know how to implement this in Wappler so can someone explain to me how to do this?
Thanks in advance for any help!!

PS: @Teodor Are you guys using this VIES API on Wappler’s account subscription payment pages as well or do you use an alternative validation method?