Not getting Authorization dialog for App Script accessing BigQuery Service - google-apps-script

Question

I am trying to fix some App Scripts which use the BigQuery "Advanced Service" to install some BigQuery jobs. The first new script I ran popped a BigQuery authorization dialog, and everything worked fine, now running hourly. The second new script ran initially, but is now failing with:
{
"error": {
"errors": [
{
"domain": "global",
"reason": "required",
"message": "Login Required",
"locationType": "header",
"location": "Authorization"
}
],
"code": 401,
"message": "Login Required"
}
}
This began about 12 hours after the initial authorization, so it seems like something expired. But, I can't figure out how to trigger the authorization dialog to appear. Also, I expected an authorization would be required for each distinct function, yet the second one initially ran without asking for BigQuery permissions.
Additional Info:
Here is the .gs file I am executing:
function runQuery() {
var projectId = redacted;
var configuration = {
"query": {
"useQueryCache": false,
"destinationTable": {
"projectId": projectId,
"datasetId": redacted,
"tableId": redacted
},
"writeDisposition": "WRITE_TRUNCATE",
"createDisposition": "CREATE_IF_NEEDED",
"allowLargeResults": true,
"query": redacted
}
};
var job = {
"configuration": configuration
};
var jobResult = BigQuery.Jobs.insert(job, projectId);
var jobId = jobResult.jobReference.jobId;
Logger.log(jobResult);
}
The first time I ran a very similar query, I got a dialog prompting me for BigQuery permissions, as documented here:
https://developers.google.com/apps-script/guides/services/authorization
I subsequently ran this same script successfully (with slightly different query config). But, then, about 12 hours after first run, I started getting the authorization return quoted above. I thought it might refresh with time, but still get same failure.

Answer 1

Turns out this has been working all along. The authorization error was being generated by my attempt to look at the job results, not by the job itself. Doh!