public string GetGroups()
        {
            List <LdapEntry> ldapGroups = DtypUtility.GetGroups(domainName, adminName, adminPassword);
            List <Group>     groups     = new List <Group>();

            foreach (LdapEntry groupEntry in ldapGroups)
            {
                string groupName      = groupEntry.GetAttribute("name").StringValue;
                byte[] groupSidBinary = groupEntry.GetAttribute("objectSid").ByteValue;
                _SID   groupSid       = TypeMarshal.ToStruct <_SID>(groupSidBinary);
                Group  group          = new Group();
                group.Name = groupName;
                group.Sid  = groupSid;
                groups.Add(group);
            }

            return(JsonSerializer.Serialize(groups, serializerOptions));
        }