* for metadata or logout operations, so this method returns null.
     *
     * @param responseType The type of SSO response requested
     * @return Always returns null for SPNEGO authentication
     */
    @Override
    public ActionResponse getResponse(final SsoResponseType responseType) {
        return null;
    }

    /**
     * Performs logout for the specified user.
     *

                return null;
            }).orElse(null);
        }
        return null;
    }

    @Override
    public ActionResponse getResponse(final SsoResponseType responseType) {
        return switch (responseType) {
        case METADATA -> getMetadataResponse();
        case LOGOUT -> getLogoutResponse();
        default -> null;
        };
    }

    /**
     * Gets the metadata response.

ontent&&(""!==e._settings.sourceSelector&&(t=n.default(t).find(e._settings.sourceSelector).html()),e._parent.find(e._settings.content).html(t)),e._settings.onLoadDone.call(n.default(e),t),e._removeOverlay()}),""!==this._settings.responseType&&this._settings.responseType).fail((function(t,a,i){if(e._removeOverlay(),e._settings.loadErrorTemplate){var o=n.default(e._settings.errorTemplate).text(i);e._parent.find(e._settings.content).empty().append(o)}e._settings.onLoadFail.call(n.default(e),t,a,i)}...

        resolver.resolve(OpenIdConnectCredential.class, credential -> OptionalEntity.of(credential.getUser()));
    }

    @Override
    public ActionResponse getResponse(final SsoResponseType responseType) {
        return null;
    }

    @Override
    public String logout(final FessUserBean user) {
        return null;
    }