// Verify
        assertNull(result);
    }

    // Test resolveCredential method
    @Test
    public void test_resolveCredential_withValidResolver() {
        // Setup
        TestLoginCredentialResolver resolver = new TestLoginCredentialResolver();

        // Execute
        authenticator.resolveCredential(resolver);

        // Verify
        assertTrue(authenticator.isResolverCalled());

     * and SSO authentication through configured authenticators.
     *
     * @param resolver the credential resolver to use
     */
    @Override
    protected void resolveCredential(final CredentialResolver resolver) {
        resolver.resolve(LocalUserCredential.class, credential -> {
            final LocalUserCredential userCredential = credential;

        }

        @Override
        public LoginCredential getLoginCredential() {
            return loginCredential;
        }

        @Override
        public void resolveCredential(LoginCredentialResolver resolver) {
            // Not used in these tests
        }

        @Override
        public ActionResponse getResponse(SsoResponseType responseType) {

    protected String getOicAuthServerUrl() {
        return ComponentUtil.getSystemProperties().getProperty(OIC_AUTH_SERVER_URL, "https://accounts.google.com/o/oauth2/auth");
    }

    @Override
    public void resolveCredential(final LoginCredentialResolver resolver) {
        resolver.resolve(OpenIdConnectCredential.class, credential -> OptionalEntity.of(credential.getUser()));
    }

    @Override

     * if the user is an admin user or needs to be authenticated through LDAP.
     *
     * @param resolver The credential resolver to use for user lookup
     */
    @Override
    public void resolveCredential(final LoginCredentialResolver resolver) {
        resolver.resolve(SpnegoCredential.class, credential -> {
            final String username = credential.getUserId();

        if (logger.isDebugEnabled()) {
            logger.debug("SamlCredential: {}", samlCredential);
        }
        return samlCredential;
    }

    @Override
    public void resolveCredential(final LoginCredentialResolver resolver) {
        resolver.resolve(SamlCredential.class, credential -> OptionalEntity.of(credential.getUser()));
    }

    @Override