Google Ad Manager API Report Querying

Google has the following docs for the ad manager here. Unfortunately their example:

# Set the start and end dates of the report to run (past 8 days). end_date = date.today() start_date = end_date - timedelta(days=8) # Create report job. report_job = {     'reportQuery': {         'dimensions': ['LINE_ITEM_ID', 'LINE_ITEM_NAME'],         'columns': ['AD_SERVER_IMPRESSIONS', 'AD_SERVER_CLICKS',                     'AD_SERVER_CTR', 'AD_SERVER_CPM_AND_CPC_REVENUE',                     'AD_SERVER_WITHOUT_CPD_AVERAGE_ECPM'],         'dateRangeType': 'CUSTOM_DATE',         'startDate': start_date,         'endDate': end_date     } } # Initialize a DataDownloader. report_downloader = client.GetDataDownloader(version='v202008') try:   # Run the report and wait for it to finish.   report_job_id = report_downloader.WaitForReport(report_job) except errors.AdManagerReportError as e:   print('Failed to generate report. Error was: %s' % e) with tempfile.NamedTemporaryFile(     suffix='.csv.gz', mode='wb', delete=False) as report_file:   # Download report data.   report_downloader.DownloadReportToFile(       report_job_id, 'CSV_DUMP', report_file) 

yields a KeyError: 'date' on the report_job_id line. My authorization is correct and I can make other calls with my client. My question is, how does one need to update report_job in order for the example to work. I tried changing 'dateRangeType' however this states it must be 'CUSTOM_DATE'.