Looking for logging into the Aws Oauth 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 Aws Oauth site. After that you can login as usual with your login credentials.
https://docs.aws.amazon.com/ja_jp/cognito/latest/developerguide/authentication-flow.html
https://aws.amazon.com/jp/cognito/
https://docs.aws.amazon.com/ja_jp/cognito/latest/developerguide/authorization-endpoint.html
https://docs.aws.amazon.com/ja_jp/cognito/latest/developerguide/login-endpoint.html
https://developer.amazon.com/ja/login-with-amazon
https://docs.aws.amazon.com/ja_jp/cognito/latest/developerguide/cognito-scenarios.html
https://qiita.com/wadahiro/items/ad36c7932c6627149873
https://qiita.com/TakahikoKawasaki/items/b372ab49da0a9aedb76a
https://kotororo.net/2018/05/%E3%81%AF%E3%81%98%E3%82%81%E3%81%A6%E3%81%AEcognito-cognito%E3%81%AE%E3%83%AD%E3%82%B0%E3%82%A4%E3%83%B3ui%E3%82%92%E4%BD%BF%E3%81%A3%E3%81%A6%E8%AA%8D%E8%A8%BC%E3%82%B7%E3%82%B9%E3%83%86%E3%83%A0%E3%82%92%E5%AE%9F%E8%A3%85%E3%81%97%E3%81%9F%E3%81%BE%E3%81%A8%E3%82%81/
https://dev.classmethod.jp/cloud/alb-cognito-user-pool/
http://tech.sanwasystem.com/entry/2018/06/19/103639
https://stackoverflow.com/questions/32236568/how-to-set-up-an-oauth2-authentication-provider-with-aws-api-gateway
https://itnext.io/google-sign-in-using-aws-amplify-and-amazon-cognito-69cc3bf219ad