code: private static URI buildDefaultURI(final String userId) {
          // Construct the default URI for the user ID that is not a URI.
          String userAgentBaseUri = System.getProperty(USER_AGENT_BASE_URI_PROPERTY);
          if (isNullOrEmpty(userAgentBaseUri)) {
              // use the default local user agent base uri
              userAgentBaseUri = DEFAULT_USER_AGENT_BASE_URI;
          }
  
          final String userAgentUri = userAgentBaseUri + userId;
  
          LOGGER.trace("Default URI is created for user {}: {}", userId, userAgentUri);
          return URI.create(userAgentUri);
      }
docs: Build default URI with the configured base uri for agent
  @param userId of which a URI will be created
  @return URI