// map of user names to groups they are a member of
	iamUserGroupMemberships map[string]set.StringSet
	// map of group names to policy names
	iamGroupPolicyMap *xsync.MapOf[string, MappedPolicy]
}

func newIamCache() *iamCache {
	return &iamCache{
		iamPolicyDocsMap:        map[string]PolicyDoc{},
		iamUsersMap:             map[string]UserIdentity{},
		iamUserPolicyMap:        xsync.NewMapOf[string, MappedPolicy](),