curl --request GET \
  --url https://{api_endpoint}/api/v1/vector-indices/{index_id}/collections \
  --header 'Authorization: Bearer <token>'

[
  {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "tenant_id": "<string>",
    "tenant_name": "<string>",
    "title": "<string>",
    "description": "<string>",
    "created_on": "2023-11-07T05:31:56Z",
    "created_by": "<string>",
    "created_by_username": "<string>",
    "updated_at": "2023-11-07T05:31:56Z",
    "tags": [
      "<string>"
    ],
    "name": "<string>"
  }
]