Function safe_authenticator::ffi::auth_exe_file_stem

#[no_mangle]
pub unsafe extern "C" fn auth_exe_file_stem(
    user_data: *mut c_void, 
    o_cb: extern "C" fn(user_data: *mut c_void, result: *const FfiResult, filename: *const c_char)
)

Returns the expected name for the application executable without an extension