SIDN: Add holder name in Whois using Python

[janwillemstegink]

The holder name 'misses in Whois using Python.
https://rdap.hostingtool.nl/modeling_domain/index.php?language=2&domain=sidn.nl

RDAP: registrant_full_name Stichting Internet Domeinregistratie Nederland
Whois:
Domain name: sidn.nl
Status: active

Registrar:
Stichting Internet Domeinregistratie Nederland
Meander 501
6825MD Arnhem
Netherlands

Abuse Contact:
+31.263525555
[email protected]

DNSSEC: yes

Domain nameservers:
ns5.sidn.nl 145.40.68.55
ns5.sidn.nl 2604:1380:4601:6300:0:0:0:1
ns3.sidn.nl 194.0.28.10
ns3.sidn.nl 2001:678:2c:0:194:0:28:10
ns4.sidn.nl 212.114.120.108
ns4.sidn.nl 2001:7b8:62b:1:0:d4ff:fe72:786c

Creation Date: 1999-11-18

Updated Date: 2021-10-14

Record maintained by: SIDN BV

---

{
"domain_name": "sidn.nl",
"expiration_date": null,
"updated_date": "2021-10-14 00:00:00",
"creation_date": "1999-11-18 00:00:00",
"status": "active",
"registrar": "Stichting Internet Domeinregistratie Nederland",
"registrar_address": "Meander 501",
"registrar_postal_code": "6825MD",
"registrar_city": "Arnhem",
"registrar_country": "Netherlands",
"dnssec": "yes",
"name_servers": [
"",
"Creation",
"Updated",
"ns3.sidn.nl",
"ns4.sidn.nl",
"ns5.sidn.nl"
]
}