Hi, Thank you for reaching out to the Google Ads API support team.
After reviewing your concern, I understand you are getting the unauthorized client error when listing the accessible customers via the Google Ads API. Kindly note that this error usually occurs when there's an issue with your OAuth credentials. Please make sure you have generated them with an email address that has access to your account. I would recommend checking out this guide to see how Google Ads API calls can be authorized through OAuth2. If possible, re-generate your OAuth credentials as explained in the suggested documentation. If you are still receiving that error, please share the email address you used to generate the credentials along with complete API logs (request and response with request-id and request header) generated at your end. Kindly note that you have to enable logging if you are using a client library. You can refer to the guides Java, .Net, PHP, Python, Ruby or Perl to enable logging at your end. For REST interface requests, you can enable logging via the curl command by using the -i flag. This message is in relation to case "ref:!00D1U01174p.!5004Q02rzkmG:ref" Thanks, Google Ads API Team -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog: https://googleadsdeveloper.blogspot.com/ =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ You received this message because you are subscribed to the Google Groups "AdWords API and Google Ads API Forum" group. To post to this group, send email to adwords-api@googlegroups.com To unsubscribe from this group, send email to adwords-api+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/adwords-api?hl=en --- You received this message because you are subscribed to the Google Groups "Google Ads API and AdWords API Forum" group. To unsubscribe from this group and stop receiving emails from it, send an email to adwords-api+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/adwords-api/iHSA7000000000000000000000000000000000000000000000S9Z7C400C0OVWooaTtGgHjVQSgOkuw%40sfdc.net.