Custom login for a third-party application

[konrad.sopala]

Not sure if I understand you correctly but I guess this FAQ will answer your question:

I developed app UI myself, how do I add authentication now?

Question: How do I add authentication to the app UI, I developed myself? Solution Don’t worry if you’ve decided to build your own login user interface instead of utilizing one of our ready to use solutions like Lock or Universal Login. There’s no problem to add the authentication to them too! By hitting the right endpoints of our Authentication API you can implement things like: Signup Username & Password Login Social Login Logout and many more! Check out the supporting documentation! Sup…