fix in get_account_hierarchy

[CefBoud]

I had the same error mentionned in #441 using code based on examples/account_management/get_account_hierarchy.py.

Error with message "User doesn't have permission to access customer. Note: If you're accessing a client customer, the manager's customer id must be set in the 'login-customer-id' header. See https://developers.google.com/google-ads/api/docs/concepts/call-structure#cid".

The error occurs in the client.get_service("GoogleAdsService").search method because the client doesn't have a login_customer_id .

Assigning the seed_customer_id (which is part of the accessible customers) to GoogleAdsClient that generates GoogleAdsService worked for me.

for seed_customer_id in seed_customer_ids:
        client.login_customer_id = str(seed_customer_id)
        googleads_service = client.get_service("GoogleAdsService")

[google-cla[bot]]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

:memo: Please visit https://cla.developers.google.com/ to sign.

Once you've signed (or fixed any issues), please reply here with @googlebot I signed it! and we'll verify it.

---

What to do if you already signed the CLA

Individual signers

• It's possible we don't have your GitHub username or you're using a different email address on your commit. Check your existing CLA data and verify that your email is set on your git commits.

Corporate signers

• Your company has a Point of Contact who decides which employees are authorized to participate. Ask your POC to be added to the group of authorized contributors. If you don't know who your Point of Contact is, direct the Google project maintainer to go/cla#troubleshoot (Public version).
• The email used to register you as an authorized contributor must be the email used for the Git commit. Check your existing CLA data and verify that your email is set on your git commits.
• The email used to register you as an authorized contributor must also be attached to your GitHub account.

ℹ️ Googlers: Go here for more info.

[CefBoud]

@googlebot I signed it!

[ThatsJustCheesy]

The changes here fixed the example for me. Previously, I was getting "User doesn't have permission to access customer."

The final patched code:

for seed_customer_id in seed_customer_ids:
    client.login_customer_id = seed_customer_id
    googleads_service = client.get_service("GoogleAdsService")

using @BenRKarl's suggested change as well (customer_service.parse_customer_path above)