How to get invitation messages

[GaryAF]

Hello everyone, I'm trying to retrieve private message invitations but unfortunately I can't find any possibility in the API.

I'm trying the /direct_threads route with all the different parameters but nothing works.

I'd also like to point out that the documentation is not up to date since in the code there exists a "box" field that can take values ("general", "primary") but nothing indicates this in the documentation.

I don't know if my request requires an evolution or if I'm not using the correct API route.

Thanks in advance