
Hi Caleb,
Thank you for reaching out to us.
Could you confirm if the argument you are referring to is the customer_id? If yes, then kindly note that the client customer ID is the account number of the Google Ads client account you want to manage with the API, usually in the form 123-456-7890.

Optionally, the client customer ID can be left out of the config file and set programmatically. Once your developer token is approved, you can use a client customer ID from a production account instead of a test account(https://developers.google.com/google-ads/api/docs/first-call/test-accounts). You may check this documentation(https://developers.google.com/google-ads/api/docs/first-call/overview#config) for more information.
Let me know if you have further questions.
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Google Ads API Team |