Looking for logging into the Admin Button 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 Admin Button site. After that you can login as usual with your login credentials.
https://www.w3schools.com/howto/howto_css_login_form.asp
https://codex.wordpress.org/Customizing_the_Login_Form
https://wordpress.org/plugins/admin-custom-login/
https://github.com/netlify/netlify-cms/issues/1681
https://community.shopify.com/c/-/-/m-p/335791
http://www.sassieshop.com/2formcreation/admin/classie/pdfs/Sassie101.pdf
https://admin.booking.com/
https://help.salesforce.com/apex/HTViewSolution?urlname=Enabling-Organization-Admins-Can-Login-as-Any-User
https://www.wpbeginner.com/plugins/how-to-create-custom-login-page-for-wordpress/
https://www.fixrunner.com/cannot-login-wordpress-admin-area/
https://wsvincent.com/django-user-authentication-tutorial-login-and-logout/
https://stackoverflow.com/questions/19531044/creating-a-very-simple-1-username-password-login-in-php/19531260
https://support.wix.com/en/article/adding-a-webmaster-login-button-5200731