fessLoginAssist.findLoginUser(new LocalUserCredential(getUserBean().get().getUserId(), oldPassword)).orElseGet(() -> {
            throwValidationError(messages -> {
                messages.addErrorsNoUserForChangingPassword(GLOBAL);
            }, validationErrorLambda);
            return null;
        });
    }

    private OptionalThing<HttpSession> getSession() {

        fessLoginAssist.findLoginUser(new LocalUserCredential(getUserBean().get().getUserId(), form.oldPassword)).orElseGet(() -> {
            throwValidationError(messages -> {
                messages.addErrorsNoUserForChangingPassword(GLOBAL);
            }, validationErrorLambda);
            return null;
        });
    }

    /**
     * Returns the index HTML response.
     *
     * @return the HTML response

     * message: The current password is not correct.
     * </pre>
     * @param property The property name for the message. (NotNull)
     * @return this. (NotNull)
     */
    public FessMessages addErrorsNoUserForChangingPassword(String property) {
        assertPropertyNotNull(property);
        add(property, new UserMessage(ERRORS_no_user_for_changing_password));
        return this;
    }

    /**