__main__.py

import pulumi

from hatch.pulumi.aws import dynamodb
from provision.cloudtrail import provision_cloudtrail
from provision.datadog import provision_datadog
from provision.iam import provision_packer_role, provision_users_groups
from provision.route53 import provision_route53

stack_config = pulumi.Config()
account_config = stack_config.require_object("config")
stack_name = account_config.get("name")

# there's more, but it errors within this
cloudtrail_bucket = provision_cloudtrail(stack_name=stack_name)

cloudtrail.py

def provision_cloudtrail(stack_name):
    account_id = get_caller_identity().account_id # <-- here