move-to-ou being invoked with null for account_id

[puddleglum1904]

On a new account creation run using AVM, the move-to-ou function fails on the first run with a null value passed:

Sample log snippet:

START RequestId: 12ca5541-e4de-46a0-b495-f2614f2e9412 Version: $LATEST
--
[INFO]	2020-12-08T21:40:48.967Z	12ca5541-e4de-46a0-b495-f2614f2e9412	Create
[INFO]	2020-12-08T21:40:49.253Z	12ca5541-e4de-46a0-b495-f2614f2e9412	Found credentials in environment variables.
[INFO]	2020-12-08T21:40:50.513Z	12ca5541-e4de-46a0-b495-f2614f2e9412	list_parents: {'ChildId': 'null'}
[INFO]	2020-12-08T21:40:50.514Z	12ca5541-e4de-46a0-b495-f2614f2e9412	searching, NextToken: FirstPage
[ERROR]	2020-12-08T21:40:50.713Z	12ca5541-e4de-46a0-b495-f2614f2e9412	An error occurred (InvalidInputException) when calling the ListParents operation: You provided a value that does not match the required pattern.
[INFO]	2020-12-08T21:40:50.982Z	12ca5541-e4de-46a0-b495-f2614f2e9412	Status message: OK 200
END RequestId: 12ca5541-e4de-46a0-b495-f2614f2e9412
REPORT RequestId: 12ca5541-e4de-46a0-b495-f2614f2e9412	Duration: 2026.49 ms	Billed Duration: 2027 ms	Memory Size: 128 MB	Max Memory Used: 76 MB	Init Duration: 567.75 ms

If the AVM product is run a second time it works w/o issue.

[eamonnfaherty]

I think this may have been due to #46

When this occurred what was the outputs value for AccountId in the account creation product?

[puddleglum1904]

@eamonnfaherty we had already applied the fix you pushed up for account-creation-shared when this error occurred.