code: public String buildAppSecureUrl(LibertyServer theServer, String root, String app) throws Exception {
  
          return SecurityFatHttpUtils.getServerSecureUrlBase(theServer) + root + "/rest/" + app + "/" + MpJwtFatConstants.MPJWT_GENERIC_APP_NAME;
  
      }
docs: Build the https app url
  
  @param theServer - The server where the app is running (used to get the port)
  @param root - the root context of the app
  @param app - the specific app to run
  @return - returns the full url to invoke
  @throws Exception