Looking for logging into the Sdk 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 Sdk site. After that you can login as usual with your login credentials.
https://developer.amazon.com/docs/login-with-amazon/install-sdk-android.html
https://developer.amazon.com/docs/login-with-amazon/javascript-sdk-reference.html
https://developers.facebook.com/docs/facebook-login/ios/
https://developers.facebook.com/docs/reference/javascript/FB.login/
https://developers.google.com/identity/sign-in/ios/sdk/
https://developers.google.com/identity/sign-in/android/start-integrating
https://github.com/UniversalLogin/UniversalLoginSDK
https://www.npmjs.com/package/universal-login-sdk
https://www.zf-laser.com/Login-SDK.176.0.html?&L=1
https://auth0.com/docs/quickstart/native/android/00-login
https://medium.com/react-native-training/facebook-sdk-with-login-for-react-native-apps-in-2018-196601804f66
https://stackoverflow.com/questions/33584031/how-to-implement-facebook-login-in-android-using-facebook-sdk-4-7
https://developers.line.biz/line-login/overview