Permission Error with creative_sourcing_spec

[Douglas42digital]

`sitelinks = [
{
'site_link_title': 'Link 1 Title',
'site_link_url': 'https://example.com/link1'
},
{
'site_link_title': 'Link 2 Title',
'site_link_url': 'https://example.com/link2'
},
]

promotion_metadata = [
{
'end_date': 1627776000,
'promotion_source': 'ADVERTISER_INPUT',
'promotion_type': 'PERCENTAGE_OFF',
'promotion_value': 10.0,
'required_code': 'SUMMER10',
'start_date': 1625097600,
}
]
creative_sourcing_spec = {
"site_links_spec": sitelinks,
# "promotion_metadata_spec": promotion_metadata,
"source_url": 'https://www.digital.de/'
}

creative_params = {
'name': 'Your Ad Creative Name',
'object_story_spec': {
'page_id': page_id,
'instagram_actor_id': instagram_page_id,
'link_data': {
'link': 'https://www.digital.de/',
'message': 'Testing Your ad message',
'name': 'Testing Your headline',
'description': 'Testing Your ad description',
}
},
'contextual_multi_ads': {
"enroll_status": "OPT_IN"
},
'degrees_of_freedom_spec': {
'creative_features_spec': {
'standard_enhancements': {
'enroll_status': 'OPT_IN'
}
}
},
'creative_sourcing_spec': creative_sourcing_spec
}

ad_creative = AdAccount(ad_account_id).create_ad_creative(fields=[], params=creative_params)
print(ad_creative)

ad_params = {
'name': 'Testing Site Links and Offers Ad Name',
'adset_id': 209987......,
'creative': {'creative_id': ad_creative['id']},
'status': 'PAUSED',
}

AdAccount(ad_account_id).create_ad(fields=[], params=ad_params)
`

What permissions are required to use creative_sourcing_spec? Is the above implementation correct for using sitelinks and promotion metadata in an ad?