Some recipes rely on the cdk to provision resources as pre-requisite.
These resources will have IDs, metadata, that needs to be extracted for the recipe instructions later on.

Running the command:
python helper.py
Was not working for me, even if I had exported my AWS_REGION in the terminal days earlier (export AWS_REGION=eu-west-2)
Then I realised I needed to execute the command:
export AWS_REGION=eu-west-2
While I was in the virtual environment (.venv)
And then only, run the command:
python helper.py

I would consider making it more clear in the step by step guidance, as it is possible some people will do like me, and won't be able to execute the helper script.
PS: I am a beginner so maybe this will be obvious to others but it was not to me.