code: def complete_request(self, account_id, request_id, **params):
          
          response = self._post(
              'v2', 'accounts', account_id, 'transactions', request_id,
              'complete', data=params)
          return self._make_api_object(response, APIObject)
docs: https://developers.coinbase.com/api/v2#complete-request-money