For the websites there are two options.
First you Sign Up with your personal information. And then you sign in.
In the Theme that I utilize, there is a "Log in - Sign in" section and box where you enter your mail and password.
But Icouldn't add Sign Up box where customers can sign themselves up. In the theme I use it's divided into two subsections
I can log in to the site whereas there is no registration page I can add into the site.