final String nonce = UuidUtil.create();
        storeStateInSession(request.getSession(), state, nonce);
        final String authUrl = getAuthority() + getTenant()
                + "/oauth2/authorize?response_type=code&scope=directory.read.all&response_mode=form_post&redirect_uri="
                + URLEncoder.encode(getReplyUrl(request), Constants.UTF_8_CHARSET) + "&client_id=" + getClientId()

            }
        }
        return null;
    }

    public ActionResponse getResponse(final SsoResponseType responseType) {
        if (available()) {
            final SsoAuthenticator authenticator = getAuthenticator();
            if (authenticator != null) {
                return authenticator.getResponse(responseType);
            }
        }
        return null;
    }

    public String logout(final FessUserBean user) {

public interface SsoAuthenticator {

    LoginCredential getLoginCredential();

    void resolveCredential(LoginCredentialResolver resolver);

    ActionResponse getResponse(SsoResponseType responseType);

    String logout(FessUserBean 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;
        };
    }

        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;
    }

            }
            return OptionalEntity.empty();
        });
    }

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

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