[Mailman-Developers] Unable to commit changes from mailman shell to database

Hi I have been playing with mailman shell but upon creating objects like domains and addresses, and subsequestly committing them to database by calling transaction.commit() I am unable to see changes in the database(and thus on Postorius) The current approach I am taking towards committing transaction is first creating a connection object by calling config.db.engine.connect() . After that, I am creating a transaction object by calling connection.begin() . Finally after creating domain and address objects, I call transaction.commit(),which executes succesfully, but I am unable to see changes being reflected in the database. Thanks Anirudh Dahiya (IRC spark)