docs: public static String getClientConfigurationUri(final OidcRegisteredService registeredService,
                                                     final String serverPrefix) throws URISyntaxException {
          return new URIBuilder(serverPrefix
              .concat('/' + OidcConstants.BASE_OIDC_URL + '/' + OidcConstants.CLIENT_CONFIGURATION_URL))
              .addParameter(OidcConstants.CLIENT_REGISTRATION_CLIENT_ID, registeredService.getClientId())
              .build()
              .toString();
      }