To allow users to register on your website, you may link them directly to the website registration URL. Each website has a unique registration URL depending on the website plan.
Personal & Business Plans
yourwebsiteURL – Is the link to your website frontend. If you assigned your own domain to your website, you may use it instead.
Online Store Plan
The online store also has support for the system registration URL:
However, you also get the option to link your users directly to the My Account page of the online store, which will trigger the login/registration accordingly.