def repay_loan(self, order_id, amount, _async=False):
        """
        归还借贷
        :param order_id:
        :param amount:
        :return:
        """
        params = {'order-id': order_id, 'amount': amount}
        path = f'/v1/margin/orders/{order_id}/repay'
        return api_key_post(params, path, _async=_async)