You might be able to do something like this to trick it into being a virtual field:
db.user.account = Field.Virtual(lambda row: row.account_id) This just makes a virtual field "account" which returns the value of "account_id". This will only work with reads, though. If you try to set a value to db.user.account, it will not work, you have to set it to db.user.account_id.
