iamFilesListing := iamOS.cachedIAMListing.Load().(map[string][]string)
		listKey := policyDBSTSUsersListKey
		if isGroup {
			listKey = policyDBGroupsListKey
		}
		for _, item := range iamFilesListing[listKey] {
			stsUserName := strings.TrimSuffix(item, ".json")
			entityKeysInStorage.Add(stsUserName)
		}
	} else {
		// For non-iam object store, we copy the mapping keys from the cache.
		cache := sys.store.rlock()