I've got the permission error as below with ListAccessibleCustomers function of Google Ads API with a developer token which has basic access level.
error message: The caller does not have permission
Calling ListAccessibleCustomers function with another developer token which has only test account access level always succeed.
I thought that a google cloud project for the developer token with basic access level might be paired to the another developer token with test access level.
Therefore, I've created a new google cloud project and tried to call ListAccessibleCustomers.
But, still get the permission error.
Am I missing some steps to be able to use developer token with basic access?
An OAuth consent screen for basic access hasn't verified yet.
OAuth scopes for basic access are the same as test access.
And I still try to access with localhost.
(I've been trying the above with go library)