docs: def getaccountaddress(self, user_id=""):
          """Get the coin address associated with a user id.
  
          If the specified user id does not yet have an address for this
          coin, then generate one.
  
          Args:
            user_id (str): this user's unique identifier
  
          Returns:
            str: Base58Check address for this account
  
          """
          address = self.rpc.call("getaccountaddress", user_id)
          self.logger.debug("Your", self.coin, "address is", address)
          return address