Cannot handle AWS ControlTower managed accounts

[jessechahal]

If you use AWS ControlTower to create and manage your AWS child/sub-accounts it creates different roles for StackSets. It seems like this repo will not working when the end user is leverage ControlTower (even though controltower uses aws organization, stacksets, etc...)

[SepehrCloud]

The issue with AWS Control Tower is due to cross-account roles already being created by Control Tower. The template provided here is a sample and doesn't work out of the box with all situations.
I will endeavour to address Control Tower integration to be smoother.