Web design ecommerce question. How do I set up individual accounts for each customer?

I am a web design student and I have to set up an ecommerce site. I have the shopping cart thing down, but I would like to set it up so each person can create there own login/account. I really have no idea how to do this. Can someone help me out please?

Should I take a fast track intensive course in graphic design or take individual courses?

Parsons offers a certificate in graphic/digital design and I’m debating whether I should take the fast track course which is the Graphic/Digital Design Basic Core class which combines a bunch of courses in one. Or should I take all the classes that make up that class individually (i.e. Graphic Design, Color Theory, Digital Imaging with [...]