From Theme Settings -> OTHER SETTINGS

My Account Page
This Setting allows you to setup the Account Page for Customers login or register on your store.
Login and register: Enable for login and register in one page
Privacy policy: You can enable this option and link to your Privacy Policy Page.
Which page to show: You can choose a destination page for the customers after registering or logging in.
Enable Social Login: Your customers can be able to login with their Social account to avoid wasting time. They can only do this when you install Growave.

Register and login form will be created automatically, you can only change the text by go to Edit languages from top bar.