Looking for logging into the Unity 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 site. After that you can login as usual with your login credentials.
https://id.unity.com/
https://unity3d.com/
https://stackoverflow.com/questions/41783872/how-to-make-a-login-window-in-unity
https://unity.serverintellect.com/
https://my.unity.edu/
https://unity.mach.com/
https://test.rategain.com/Unity
https://developers.facebook.com/docs/unity/examples/
https://unity.3drehab.co.uk/
https://github.com/twitter/twitter-kit-unity/wiki/Log-In-with-Twitter
https://firebase.google.com/docs/auth/unity/facebook-login
https://www.australianunity.com.au/health-insurance/login
http://unityconnects.com/