code: public SecurityProvider getSecurityProvider() {
          checkState(InitializedState.INITIALIZED, InitializedState.INITIALIZED);
          List<SecurityProvider> securityProviders = aggregatedModule.getSecurityProviders();
          return new AggregatedSecurityProvider(securityProviders);
      }
docs: Returns a {@link SecurityProvider} instance that combines all instances
  registered by modules.
  
  @return resource lookup