How do I restrict purchasing to registered users

I am using HikaShop of course. How do I restrict customers from purchasing items unless they are registered users? Thanks in advance for your help.

Hello,

I think that you should just :

- Go to "Hikashop->System->Configuration->Checkout"
- Set the "Registration" to no registration and the "Login" to YES

Then when your customers will be redirected to the checkout, they'll have to login or register to purchase your goods.