code: private void registerQuickStartSecurityRegistryConfiguration() {
          if (bc == null) {
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
                  Tr.debug(tc, "BundleContext is null, we must be deactivated.");
              }
              return;
          }
          if (urConfigReg != null) {
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
                  Tr.debug(tc, "QuickStartSecurityRegistry configuration is already registered.");
              }
              return;
          }
          if (isStringValueUndefined(config.userName()) || isStringValueUndefined(config.userPassword())) {
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
                  Tr.debug(tc, "Incomplete configuration. This should already have been reported. Will not register QuickStartSecurityRegistry configuration.");
              }
              return;
          }
          if (config.UserRegistry() != null && config.UserRegistry().length > 0) {
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
                  Tr.debug(tc, "Other UserRegistryConfiguration are present, will not register the QuickStartSecurityRegistry configuration.");
              }
              return;
          }
          if (!managementRoles.isEmpty()) {
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
                  Tr.debug(tc, "Other ManagementRole are present, will not register the QuickStartSecurityRegistry configuration.");
              }
              return;
          }
          Dictionary<String, Object> props = buildUserRegistryConfigProps();
  
          quickStartRegistry = new QuickStartSecurityRegistry(config.userName(), Password.create(config.userPassword()));
          urConfigReg = bc.registerService(UserRegistry.class,
                                           quickStartRegistry,
                                           props);
      }
docs: Create, register and return the ServiceRegistration for the quick start
  security UserRegistryConfiguration.
  
  @param bc