Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_GetGDKDefaultUser - Gets a reference to the default user handle for GDK.
HEADER FILE
Defined in SDL3/SDL_system.h
SYNOPSIS
#include "SDL3/SDL.h" bool SDL_GetGDKDefaultUser(XUserHandle *outUserHandle);
DESCRIPTION
This is effectively a synchronous version of XUserAddAsync, which always prefers the default user and allows a sign-in UI.
FUNCTION PARAMETERS
outUserHandle a pointer to be filled in with the default user handle.
RETURN VALUE
Returns true if success or false on failure; call SDL_GetError () for more information.
AVAILABILITY
This function is available since SDL 3.2.0. Simple Directmedia Layer SDL 3.2.8 SDL_GetGDKDefaultUser(3)