	users, err := ParsePasswdFilter(passwd, func(u User) bool {
		if userArg == "" {
			return u.Uid == user.Uid
		}
		return u.Name == userArg || strconv.Itoa(u.Uid) == userArg
	})
Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.