D9 Accounts Login page - Implement Accounts Login form
Here is what the login page looks like:
You can see it live here: https://accounts.eclipse.org/
The code for this page is located here: https://gitlab.eclipse.org/eclipsefdn/it/webdev/drupal/site_login/-/blob/7.x-4.x/site_login_accounts/form/site_login_accounts.user_login.inc