I have a Shopping Cart. I also have some sites that are not yet integrated to the Shopping cart. The problem is that the sites have a registration page and the shopping cart also has a separate registration page.
I need to make the sites registration pages also create the user registration at the shopping cart to save the user the problem of a double registration. So he can go directly to check out after registration at the site... Instead of having to register at the site and then making a second registration at the shopping cart if he has not joined it yet.
The shopping cart and the sites are online (live).