Dinamically Virtual Subdomain in Plesk 10.4

[christianc1]

I´m trying to setup a virtual subdomains to the users in my website. Like user john signs up and is given a subdomain to access his account, john.website.com, which when rendered in the browser will automatically bring up http://website.com/shop/john.html username=john or similar

Where I need to edit? Htacess? How?

Is there Anyone can help me with it?