improved

V2 - Updated error message for missing bank accounts

The error message returned when a bank account cannot be found via the API has been updated for improved clarity.

Previously, the message was:

Couldn't find Account with 'id'=9999

It is now:

Couldn't find BankAccount with 'id'=9999

This change updates the resource name in the error message from Account to BankAccount.

You may encounter this error when using the GET /api/external/v2/bank_accounts/:id endpoint or the POST /api/external/v2/transactions endpoint, making it clearer which resource is missing when an error occurs.