AuthorizationError.USER_PERMISSION_DENIED in while download reports

Hi,

I am also getting error while download report.

I am able to get response for "ManagedCustomerService" but when I try to download adwords reports I am getting    "AuthorizationError.USER_PERMISSION_DENIED" Error.

Can you please tell me why I am getting this error?? any specific permission require in order to get reports download?

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