AGH AdGuardHome Integration allowlist whitelist

Dear all,
with the “AdGuardHome Integration” I can successful create and activate filter-rules for the denylist. But I want to deny all and allow only specific.
I opened FeatureRequest: Add URLs to Whitelist · Issue #1452 · frenck/python-adguardhome · GitHub and saw the feature may is implemented with the keyword “allowlist”. May anybody of you uses this feature and can advise how to use?
I tried:

action: adguard.add_url
data:
  url: /root/adguardhome/data/userfilters/agh_nora_allow_youtube
  name: allowlist_Youtube_Nora
  allowlist: true

with error extra keys not allowed @ data['allowlist']. Got None

Appreciate any hints! Thanks!