Looking for logging into the Unity Tutorial 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 Unity Tutorial site. After that you can login as usual with your login credentials.
https://www.youtube.com/watch%3Fv%3D5l02kT2o5mg
https://www.youtube.com/watch%3Fv%3DvFs0_skd0E4
https://forum.unity.com/threads/tutorial-unity-and-php-login-script-simple-but-useful.24721/
https://unity3d.com/learn/tutorials/topics/user-interface-ui/creating-main-menu
https://unity3d.com/learn/tutorials
https://www.bitdegree.org/course/unity-tutorials
http://www.google.com.pk/url?url=http://support.ctalyst.com/article/setting-up-a-user-registration-and-login-system-with-unity-3d-and-the-ctalyst-plugin/
https://xinyustudio.wordpress.com/2017/01/22/using-firebase-in-unity3d-tutorial-2-authorization-and-user-login-example-with-user-name-and-password/
https://developers.facebook.com/docs/unity/examples/
https://api.playfab.com/docs/tutorials/landing-players/facebook-unity
https://firebase.google.com/docs/auth/unity/start
https://stackoverflow.com/questions/28983826/unity-login-button
https://docs.gamesparks.com/tutorials/game-engine-integrations/unity-facebook-sdk.html