Google ads API "PERMISSION_DENIED"
I get the error :
{ "message": "The caller does not have permission", "code": 7, "status": "PERMISSION_DENIED", "details": [ { "@type": "type.googleapis.com\/google.ads.googleads.v10.errors.GoogleAdsFailure", "errors": [ { "errorCode": { "authorizationError": "USER_PERMISSION_DENIED" }, "message": "User doesn't have permission to access customer. Note: If you're accessing a client customer, the manager's customer id must be set in the 'login-customer-id' header. See https:\/\/developers.google.com\/google-ads\/api\/docs\/concepts\/call-structure#cid" } ], "requestId": "asds33ad3sdadad334" } ] }
and the code I get from here : https://developers.google.com/google-ads/api/docs/reporting/example
what I need to do with login-customer-id ?