Looking for logging into the Backend 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 Backend site. After that you can login as usual with your login credentials.
https://www.drupal.org/forum/support/post-installation/2018-06-19/how-to-login-from-backend
https://maxkatz.org/2016/01/05/learn-how-to-create-user-registration-login-backend-using-server-code-and-database/
https://docs.joomla.org/J3.x:Logging_in_or_out_of_the_Administrator_back-end/de
https://contao-academy.de/blog/contao-backend-login
http://www.gambio.de/forum/threads/login-direkt-ins-backend.33731/
https://www.joomla.de/wissen/joomla-tipps-im-advent/465-tuerchen-nummer-3
https://store.shopware.com/mkx4595176126783/automatischer-backend-login.html
https://store.shopware.com/atsd01239/direkter-backend-login-per-link-aufruf.html
https://www.webquartier.org/wordpress-login-ins-backend/
https://www.novalnet.de/online-magento-benutzerhandbuch/produkteinstieg/anmeldung
https://www.youtube.com/watch%3Fv%3DX5n353jld6o
https://www.web-vision.de/support/Knowledgebase/Article/View/11/56/wie-kann-ich-mich-bei-typo3-in-das-backend-einloggen
https://www.rpv-cottbus.de/admin/login