Login\Register in Customizr Header.

Hi,
there are a lot of resources about this topic on the net.
You can use a plugin (I think something exists..), or write a php code in your child-theme functions.php.
Here’s an how-to:
https://support.woothemes.com/hc/en-us/articles/203106357-Add-Login-Logout-Links-To-The-Custom-Primary-Menu-Area

the customizr primary-menu equivalent is: ‘main’

Hope this hepls.