Looking for logging into the Google Play Services Error 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 Play Services Error site. After that you can login as usual with your login credentials.
https://www.androidpit.com/how-to-fix-google-play-authentication-is-required-error
http://www.techtudo.com.br/dicas-e-tutoriais/noticia/2017/01/problemas-para-atualizar-o-google-play-services-veja-como-resolver.html
https://answers.unity.com/questions/1372388/google-play-services-authentication-problem-failin.html
https://help.grindr.com/hc/pt/articles/360005944834-N%C3%A3o-Fazer-Poss%C3%ADvel-Fazer-Login-Google-Play-Service
https://support.google.com/googleplay/troubleshooter/2402620?hl=pt-BR
https://play.google.com/store/apps/details?id=com.google.android.gms&hl=pt_BR
https://www.youtube.com/watch?v=uh5ou0q3F8o
https://www.youtube.com/watch?v=_rvvbkFsK60
https://www.youtube.com/watch?v=C9oZBMByPK4
https://stackoverflow.com/questions/25790428/google-play-services-sign-in-error
https://www.youtube.com/watch?v=iplGvaCHy94
https://www.youtube.com/watch?v=Cfe9picbAS8
https://www.buildbox.com/forum/index.php?threads/google-play-services-sign-in-error.3522/