[Need help about bsd_auth.h/ question with Rust]

Hello ! OBSD Teams ! How are you ?

I'm a new user of OpenBSD, trying to port KDE5
(Plasma/Workspace/KWin/KScreenLocker) with wayland v1.19.0 in /usr/ports/
on OpenBSD 7.2-beta.

. Can you explain how work the typedef struct authsession_t ? (Because i
can't find him on github repo T-T)
.
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Also, Thx to add Rust stuff on OpenBSD ! Can we write driver on Rust with
Kernel Library ?