docs: def listtransactions(self, user_id="", count=10, start_at=0):
          """List all transactions associated with this account.
  
          Args:
            user_id (str): this user's unique identifier
            count (int): number of transactions to return (default=10)
            start_at (int): start the list at this transaction (default=0)
  
          Returns:
            list [dict]: transactions associated with this user's account
  
          """
          txlist = self.rpc.call("listtransactions", user_id, count, start_at)
          self.logger.debug("Got transaction list for " + str(user_id))
          return txlist