I would like to use hook to override value and I would like to know how to find the name of the field:
The ?????? is the value I a trying to find.
If you know the module of the bean then you ought to be able to look at the module's bean class or the vardefs to determine what fields are available on it.
The Account bean is located at modules/Accounts/Account.php and the vardefs is located at modules/Accounts/vardefs.php
Retrieving data ...