I created a shop and the url is like:
https://myshop.com
But my client asked me to add respective salers' id into the url so that they can do some analyses, so it would look like:
https://saler001.myshop.com
I don't know where should I start to do this trick, maybe something in the DNS settings? Currently I've suggested them using url query string, but they don't accept.
btw, this shop is on Shopify.