Looking for logging into the Ubuntu Wallpaper 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 Wallpaper site. After that you can login as usual with your login credentials.
https://vitux.com/how-to-change-login-lock-screen-background-in-ubuntu/
http://ubuntuhandbook.org/index.php/2017/10/change-login-screen-background-ubuntu-17-10/
https://askubuntu.com/questions/313526/changing-login-screen-wallpaper
https://www.ostechnix.com/how-to-change-gdm-login-screen-background-in-ubuntu/
https://www.youtube.com/watch?v=h_epKRXuSkg
https://www.youtube.com/watch?v=rnvK2TIhYns
https://www.youtube.com/watch?v=BngSi57aoeM
https://www.youtube.com/watch?v=3zkpvXuRt5Y
https://www.youtube.com/watch?v=jBs7yCVrpcQ
https://sanctum9.wordpress.com/2018/04/10/change-default-login-screen-background-in-ubuntu-17-10/
https://github.com/ubuntu/yaru/issues/964
https://www.omgubuntu.co.uk/2017/09/ubuntu-17-10-login-screen-preview
https://www.omgubuntu.co.uk/2018/05/gnome-shell-lock-screen-redesign