Hi Stephen, The "401 Unauthorized" error means that the email address that you used in generating the OAuth2 credentials is not a valid user in your account, or it could be that there is something wrong in the generation of your OAuth2 credentials itself (e.g. your refresh token is not matched with your client ID and secret). Also, the recommended authentication type for AdWords API is the "Installed application" type. See this guide <https://developers.google.com/adwords/api/docs/guides/authentication#determine_your_app_type> to know more on how to authenticate using this type. You don't need to authenticate as a service account as you only authenticate via this type if you have a G Suite domains <https://gsuite.google.com/> and your main goal is to impersonate as any user in your account.
Please try authenticating via the "Installed application" type again and let me know how it works. If you encounter any error, please provide the complete error logs as well as your clientCustomerId and the email address you used in the generation of your OAuth2 credentials via *Reply privately to author* option. Thanks, Vincent AdWords 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 "AdWords API and Google Ads API Forum" group. To unsubscribe from this group and stop receiving emails from it, send an email to adwords-api+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/adwords-api. To view this discussion on the web visit https://groups.google.com/d/msgid/adwords-api/cb5551d3-4335-4d4c-a78c-d322f7acb586%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
