code: def withdraw(self, currency, amount, address, paymentId=None):
          
          return self._private('withdraw', currency=currency, amount=amount,
                               address=address, paymentId=paymentId)
docs: Immediately places a withdrawal for a given currency, with no email
          confirmation. In order to use this method, the withdrawal privilege
          must be enabled for your API key. Required POST parameters are
          "currency", "amount", and "address". For XMR withdrawals, you may
          optionally specify "paymentId".