Looking for logging into the My Sierra Page 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 My Sierra Page site. After that you can login as usual with your login credentials.
https://mysierra.sierracollege.edu/
https://www.sierrawireless.com/login/
https://sierra.instructure.com/login/ldap
https://discussions.apple.com/thread/8094084
https://mackeeper.com/blog/post/379-how-to-ustomize-the-login-screen-in-macos-sierra/
https://apple.stackexchange.com/questions/323976/sierra-stuck-at-login-screen-password-doesnt-work
https://www.jamf.com/jamf-nation/discussions/21605/sierra-login-wallpaper
https://computers.tutsplus.com/tutorials/how-to-customise-the-background-image-on-the-mac-login-screen--cms-27625
https://null-byte.wonderhowto.com/how-to/easily-bypass-macos-high-sierras-login-screen-get-root-no-password-hacking-required-0181388/
https://appletoolbox.com/2018/07/how-to-disable-the-login-password-on-mac/
https://dillieodigital.wordpress.com/2016/11/16/quick-tip-removing-the-double-login-from-macos-sierra/
https://www.jamf.com/jamf-nation/discussions/25516/upgraded-to-high-sierra-cant-login-anymore
https://www.startwithunitec.com/How-to-Login-to-the-Sierra-Management-System