How to reference related tables in URL call in this python script?

Jinsong_pdx

This script works great to download AGOL features and attachments. Thank you. However, the same code doesn't work on related tables and attachments.

Python script to pull hosted features with attachments into a local file geodatabase. See ReadMe below. · GitHub

The data URLs are,

http://services.arcgis.com/xyz123456orgid/arcgis/rest/services/myFeatures/FeatureServer/0 (main feature class)

http://services.arcgis.com/xyz123456orgid/arcgis/rest/services/myFeatures/FeatureServer/1 (related table 1)

http://services.arcgis.com/xyz123456orgid/arcgis/rest/services/myFeatures/FeatureServer/2 (related table 2)

It doesn't work by changing

  crUrl = 'http://...FeatureServer/1/..' or

  crValues={... 'layers': '1', ...}

The original Code as,