Step 1: In Account 1, I add user truongnguy...@gmail.com with permission == admin.
Step next: Choose billing and payment => tab setting => manager users => add user(truongnguy...@gmail.com) with permission is admin.
When I login with account truongnguy...@gmail.com, In screen user interface adwords, I see setting payment, I can edit payment, add user manager, ....
But when using API call get budgetOrderService, I receive errors CUSTOMER_NOT_WHITELISTED_FOR_API? although I set full permission and on screen user interface adwords normal operation.
How to fix this problem?