Looking for logging into the Ionic Provider 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 Ionic Provider site. After that you can login as usual with your login credentials.
https://forum.ionicframework.com/t/ionic-authservice-or-login-providers/139031
https://devdactic.com/login-ionic-2/
https://scotch.io/tutorials/build-an-ionic-app-with-user-authentication
https://www.joshmorony.com/an-in-depth-explanation-of-providers-in-ionic-2/
https://medium.com/appseed-io/integrating-firebase-password-and-google-authentication-into-your-ionic-3-app-2421cee32db9
https://www.djamware.com/post/58c1703e80aca7585c808ec1/step-by-step-tutorial-building-ionic-2-rest-api-authentication
https://www.djamware.com/post/59924f9080aca768e4d2b12e/ionic-3-consuming-rest-api-using-new-angular-43-httpclient
https://gist.github.com/khairahmanplus/cde5d9855a0a05f579cb54ee3b007767
https://medium.freecodecamp.org/how-to-integrate-google-login-into-an-ionic-app-with-firebase-41cb69234919
https://medium.freecodecamp.org/how-to-develop-a-great-facebook-login-flow-with-firebase-and-ionic-656a295c4fe9
https://code.tutsplus.com/tutorials/get-started-with-ionic-services-auth--cms-28705
https://www.techiediaries.com/ionic-firebase-authentication/
https://www.technouz.com/4700/ionic3-login-authentication-google-firebase/