public static int getAssuranceLevel(String key) throws SamlSessionException {
        if (!numberMap.containsKey(key)) {
            throw new SamlSessionException("Assurance level not found");
        }
        return numberMap.get(key);
    }
@Test
    void invalidAssuranceLevelName() {
        SamlSessionException exception = assertThrows(SamlSessionException.class,
                () -> LevelOfAssurance.getAssuranceLevel("SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS"));
        assertEquals("Assurance level not found", exception.getMessage());
    }