Looking for logging into the Google Service Account Manager 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 Service Account Manager site. After that you can login as usual with your login credentials.
https://www.apkmirror.com/apk/google-inc/google-account-manager/google-account-manager-7-1-2-release/google-account-manager-7-1-2-android-apk-download/
https://stackoverflow.com/questions/10550856/android-google-account-manager-basic-login
https://cloud.google.com/iam/docs/service-accounts?hl=ja
https://eikatou.net/blog/1506.html
https://developers.google.com/android/management/service-account
https://developers.google.com/identity/
http://vividcode.hatenablog.com/entry/android/account-manager
https://qiita.com/nein37/items/25ba6e5176118fae5f13
http://d.hatena.ne.jp/adsaria/20101012/1286886888
https://support.google.com/a/answer/182076?hl=ja
https://myaccount.google.com/inactive
https://books.google.co.jp/books?id=-QcvDwAAQBAJ&pg=PA206&lpg=PA206&dq=google+login+service+account+manager
https://developer.android.com/training/id-auth/authenticate