List operational administrators in an Environment

curl -X GET "https://auth.canopy-io.com/portal/v1/accounts/{accountSlug}/admin-assignments" \
  -H "Authorization: Bearer $CANOPY_TOKEN"

{
  "items": [
    {
      "id": "string",
      "admin_role_id": "string",
      "user_id": "string",
      "environment_id": "string",
      "scope_type": "account",
      "application_node_id": "string",
      "effective_from": "2026-04-20T12:00:00.000Z",
      "effective_to": "2026-04-20T12:00:00.000Z",
      "revoked_at": "2026-04-20T12:00:00.000Z",
      "created_at": "2026-04-20T12:00:00.000Z",
      "updated_at": "2026-04-20T12:00:00.000Z"
    }
  ]
}