프론트엔드 애플리케이션에서 특정 Discourse 사이트에 로그인하는 방법을 어떻게 만들 수 있나요?

FWIW, Lexicon is not abandoned and is still under active development.

@Roie_Natan if you are familiar with Javascript, you could look at Lexicon’s source code to see how it was accomplished.

However as @merefield pointed out there are existing posts that could help you along in figuring it out.

Here is one resource talking about user sessions: Storing extra data about a user's session - #3 by sam

And you might also find the auth flow from @pmusaraj’s app useful: