Looking for logging into the Google Api 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 Api site. After that you can login as usual with your login credentials.
https://developers.google.com/identity/
https://developers.google.com/%2B/web/signin/
https://developers.google.com/api-client-library/javascript/features/authentication
https://www.youtube.com/watch%3Fv%3Dtq24CY8gA4I
https://console.cloud.google.com/%3Fhl%3Dde
https://console.cloud.google.com/apis/
https://stackoverflow.com/questions/1527947/how-do-i-implement-sign-in-with-google-on-my-site
https://docs.microsoft.com/en-us/aspnet/core/security/authentication/social/google-logins
https://github.com/googlesamples/google-signin-unity
https://api.playfab.com/documentation/client/method/LoginWithGoogleAccount
https://auth0.com/docs/connections/social/google
http://www.google.de/url?url=http://help.wpresidence.net/article/enable-gmail-google-login/
https://www.formget.com/codeigniter-google-oauth-php/