Napili automatically assigns login to its own Login page. The template does not appear to allow use of a Custom Login page. Also, the assigned Login page does not import the CMS Connect headers and footers. I need to be able to either customize the login page template to include the CMS Connect content or assign the login to a custom page of my choosing that uses the Customer service template.
Best Answer
You don't create your own login page, you modify the existing one by using your own components and (if you like) your own theme and layout.
See https://help.salesforce.com/articleView?id=networks_custom_login_self_reg_lightning.htm&type=5