Gets a reference to the default user handle for GDK.
Defined in SDL_system.h
int SDL_GDKGetDefaultUser(XUserHandle * outUserHandle);
XUserHandle * | outUserHandle | a pointer to be filled in with the default user handle. |
(int) Returns 0 if success, -1 if any error occurs.
This is effectively a synchronous version of XUserAddAsync, which always prefers the default user and allows a sign-in UI.
This function is available since SDL 2.28.0.