Yes, I’m aware of the age and I’m aware that nothing has probably changed.
The ex-staff member who posted above never fully understood the question, and the person who opened the thread decided a (stateful) workaround would do. So there’s no resolution as far as I can see.
What I’m asking is whether there’s any stateless was to use the Twitter user authentication feature. I think not, but am asking out loud here because I could be wrong.
If there’s indeed no way, it would be nice if Twitter would finally catch up with the other authentication providers and provide OAuth2. I see in the feature request thread for that that people have been asking for it regularly since 2011.