code: public SecurityProvider getSecurityProvider() {
  		List<SecurityProvider> securityProviders = aggregatedModule.getSecurityProviders();
  		PreconditionUtil.assertEquals("exactly one security provide must be installed, got: " + securityProviders, 1, securityProviders.size());
  		return securityProviders.get(0);
  	}
docs: Returns a {@link SecurityProvider} instance that combines all instances
  registered by modules.
  
  @return resource lookup