public void tearDown() {
        if (preauthService != null) {
            preauthService.cleanup();
        }
    }

    @Test
    @DisplayName("Test preauth salt generation")
    public void testPreauthSaltGeneration() {
        byte[] salt1 = preauthService.generatePreauthSalt();
        byte[] salt2 = preauthService.generatePreauthSalt();

        assertNotNull(salt1);
        assertNotNull(salt2);