Looking for logging into the Ubuntu Plasma Auswahl 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 Ubuntu Plasma Auswahl site. After that you can login as usual with your login credentials.
https://wiki.ubuntuusers.de/SDDM/
https://wiki.ubuntuusers.de/Plasma/
https://askubuntu.com/questions/871031/how-to-change-login-screen-sddm-on-kde-plasma-5
https://kilobyte.bplaced.net/ubuntu-benutzeroberflaeche-wechseln-kde/
https://linuxconfig.org/how-to-install-kde-plasma-desktop-on-ubuntu-18-04-bionic-beaver-linux
https://help.ubuntu.com/community/InstallingKDE
https://www.tutonaut.de/anleitung-linux-desktop-umgebung-aendern/
https://www.pro-linux.de/artikel/2/1949/5,kde.html
https://praxistipps.chip.de/ubuntu-benutzer-automatisch-einloggen-so-gehts_35620
https://www.pcwelt.de/tipps/KDE-neben-anderen-Desktops-installieren-9790139.html
https://www.pro-linux.de/artikel/2/1909/5,kde.html
https://www.heise.de/select/ct/2017/24/1511205075938795
https://administrator.de/forum/ubuntu-17-10-kein-login-upgrade-362659.html