Your first issue is you are using as_user_id, which is not an accepted parameter on that endpoint, so that just gets ignored. You should be using user_id.
Running the same twurl request but using user_id instead does not get you the results you expect either though:
Request
twurl -H "ads-api.twitter.com" "/0/accounts/ftr8ac/scoped_timeline?user_id=95671956" | jq .
Response
{
"errors": [
{
"code": "INVALID_PARAMETER",
"message": "Expected user ids to be promotable users, got \"95671956\" for user_ids",
"parameter": "user_ids"
}
],
"request": {
"params": {
"user_id": "95671956",
"account_id": "ftr8ac"
}
}
}
You should read up on what a promotable user is, which also covers how to check promotable users available to an Ads account, if this is not clear to you.
