If you want to add an option to allow people who visit a login link to create an account, you can add custom content to all login pages.

Example Create an Account link
Prerequisites
To have this option you will need to add a MEMBERS REGISTRATION page type to your website.
How to add a Members Registration page
- Visit WEBPAGES and choose to add a page
- Click the button Registration forms, Membership, Collaboration in the Members and Subcription section.
- Choose the registration page type and give it a custom filename if needed e.g. /create-an-account
- Customise the fields as required.
Adding a prompt to Create an Account to all login pages
- Click the MEMBERS menu link on the left-hand menu
- Once on the members page click the button SETUP button on the small button tabs top-right.
- Find and Edit the area Login Page Message found under the Customise Form Text (Global Includes) title
- Add your custom text and link to your registration page.