code: private static String getServicePassCredential(String clazz, ITestContext context) {
          if (System.getenv("SERVICES_PASS") != null) {
              return System.getenv("SERVICES_PASS");
          }
          if (context.getAttribute(clazz + SERVICES_PASS) != null) {
              return (String) context.getAttribute(clazz + SERVICES_PASS);
          } else {
              return "";
          }
      }
docs: Obtains the web services password provided for the current test suite being executed. Anything passed in from
  the command line will first be taken, to override any other values. Next, values being set in the classes will
  be checked for. If neither of these are set, an empty string will be returned
  
  @param clazz   - the test suite class, used for making threadsafe storage of
  application, allowing suites to have independent applications
  under test, run at the same time
  @param context - the TestNG context associated with the test suite, used for
  storing app url information
  @return String: the web services password to use for authentication