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