code: private void unregisterQuickStartSecurityRegistryConfiguration() {
          if (urConfigReg != null) {
              urConfigReg.unregister();
              urConfigReg = null;
              quickStartRegistry = null;
          } else {
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
                  Tr.debug(tc, "QuickStartSecurityRegistry configuration is not registered.");
              }
          }
      }
docs: Unregister the quick start security security UserRegistryConfiguration.