Looking for logging into the User Auth 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 User Auth site. After that you can login as usual with your login credentials.
https://laravel.com/docs/5.7/authentication
https://laravel.com/docs/5.0/authentication
https://book.cakephp.org/2.0/es/tutorials-and-examples/blog-auth-example/auth.html
https://docs.djangoproject.com/es/2.1/topics/auth/
https://github.com/laravel/framework/issues/161
https://developer.mozilla.org/en-US/docs/Learn/Server-side/Django/Authentication
https://blog.bitsrc.io/build-a-login-auth-app-with-mern-stack-part-1-c405048e3669
https://pythonspot.com/login-authentication-with-flask/
https://wsvincent.com/django-user-authentication-tutorial-login-and-logout/
https://scotch.io/tutorials/simple-and-easy-laravel-login-authentication
https://firebase.google.com/docs/auth/web/start
https://firebase.google.com/docs/auth/?hl=es-419
https://stackoverflow.com/questions/37467492/how-to-provide-user-login-with-a-username-and-not-an-email