// in a thread safe way once.
func GetUsersAndGroups() (*users.UsersAndGroups, error) {
	var err error
	usersAndGroupsOnce.Do(func() {
		usersAndGroups, err = users.AddUsersAndGroups()
	})
	return usersAndGroups, err
}

// DeepHashObject writes specified object to hash using the spew library
// which follows pointers and prints actual values of the nested objects