Looking for logging into the Facebook Test 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 Facebook Test site. After that you can login as usual with your login credentials.
https://developers.facebook.com/docs/facebook-login/testing-your-login-flow/
https://developers.facebook.com/docs/apps/test-users/
https://developers.facebook.com/docs/facebook-login/testing-your-login-flow/test-user-access-token/?locale=zh_HK
https://stackoverflow.com/questions/31794428/how-to-test-facebook-login
https://www.thewindowsclub.com/how-to-create-test-account-on-facebook
https://books.google.com.hk/books?id=E2Ye_ZQfEl8C&pg=PA100&lpg=PA100&dq=facebook+login+test
https://meta.discourse.org/t/configuring-facebook-login-for-discourse/13394
https://books.google.com.hk/books?id=xCzRF2DxxkYC&pg=PA271&lpg=PA271&dq=facebook+login+test
https://www.softwaretestingmaterial.com/test-scenarios-login-page/
https://www.twilio.com/blog/add-facebook-twitter-github-login-laravel-socialite
https://developers.gigya.com/display/GD/Facebook
https://api.playfab.com/docs/tutorials/landing-players/facebook-unity
https://www.adweek.com/digital/qr-code-login-facebook-test/