Looking for logging into the Drupal 8 Configure site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Drupal 8 Configure site. After that you can login as usual with your login credentials.
https://www.drupal.org/project/login_form_configure
https://www.drupal.org/forum/support/module-development-and-code-questions/2018-04-03/customize-user-login-drupal-8
https://www.drupal.org/docs/user_guide/en/config-user.html
https://www.drupal.org/docs/8/configuration-management
https://drupal.stackexchange.com/questions/211509/how-to-customize-the-user-login-form
https://opensenselabs.com/blog/tech/preventing-brute-force-attacks-drupal-login-security-module
https://www.supersaas.com/info/doc/integration/drupal_integration
https://docs.oneall.com/plugins/guide/social-login-drupal/8/
https://duo.com/docs/drupal
https://evolvingweb.ca/blog/integrating-auth0-drupal-single-sign-authentication
https://hostadvice.com/how-to/how-to-customize-the-welcome-email-in-drupal-8/
https://www.valuebound.com/resources/blog/how-to-configure-single-sign-on-across-multiple-drupal-8-platforms-or-websites
https://github.com/auth0/auth0-drupal