Looking for logging into the Multiple Social Ios 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 Multiple Social Ios site. After that you can login as usual with your login credentials.
https://firebase.google.com/docs/auth/ios/account-linking
https://stackoverflow.com/questions/26653828/login-with-multiple-social-networks
https://auth0.com/blog/using-centralized-login-to-add-authentication-to-your-ios-apps/
https://auth0.com/learn/social-login/
https://www.lynxpro.com/blog/managing-multiple-loginregistration-flows-ios-swift-app/
https://medium.com/@taylorhughes/the-right-way-to-implement-facebook-login-in-a-mobile-app-57e2eca3648b
https://developer.okta.com/authentication-guide/social-login/
https://developers.facebook.com/docs/facebook-login/multiple-providers/
https://www.appcoda.com/intermediate-swift-tips/firebase-social-login.html
https://www.appcoda.com/firebase-facebook-login/
https://developers.google.com/identity/toolkit/web/federated-login
https://github.com/twitter/twitter-kit-ios/wiki/Log-In-With-Twitter
https://itunes.apple.com/us/app/multi-social-multiple-account/id1425793871?mt=8