The situation right now is the client's account is not linked to our MCC account. We got the refresh token and access token for the client's account through the OAuth process.
Could you please let us know the step we can follow with some code sample (PHP) how to get the ClientCustomerId for the client which is not linked to our MCC. From the earlier posts I read did not get the exact steps how to get the values from the API call.
Thanks! Subash