Real Time Shop & Vbulletin

[lrmzx9]

Hello, I would like to add a shop to my main website that is linked to the members on my forum. In order to purchase items, real items with real money, I would like them to be a registered member of my web forum community. How can I link access to a commerce style page with a users login and registration through Vbulletin?

Running VB 3.6.2

Thanks