You can add the login and register shortcodes in any page using theme shortcodes:

Starting 1.15.4  to enable social login in register form enable this option from theme options – Social and Contact as in below screenshot.

social on register

The shortcodes would display like this:

shortcode

Read here how to use all register and login options:

http://help.wprentals.org/2016/08/02/register-and-login-options/