Looking for logging into the Google Sign In Challenge 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 Google Sign In Challenge site. After that you can login as usual with your login credentials.
https://support.google.com/a/answer/6002699?hl=en
https://support.google.com/a/answer/9022736?hl=en
https://myaccount.google.com/intro/security
https://gsuitetips.com/tips/gmail/identity-verification-and-login-challenges/
https://accounts.google.com/UnlockCaptcha
https://developers.google.com/identity/toolkit/web/federated-login
https://www.jerriepelser.com/blog/forcing-users-sign-in-gsuite-domain-account/
https://productforums.google.com/d/topic/gmail/4OGVXY_E5Wc
https://www.youtube.com/watch?v=zMN-l3w9nPE
https://lastpass.com/support.php?cmd=showfaq&id=7226
https://developer.cisco.com/googlechallenge/
https://medium.com/dev-channel/sign-in-on-the-web-credential-management-api-and-best-practices-d21aed14b6fe
https://www.udacity.com/google-africa-scholarships