If your bank requires the unique code, then it will prevent an automated update.
Unfortunately if the bank enforces this, there is no way to bypass it. Some banks offer a mixture of using a unique code, or a password, so if you can log in using a memorable word, or a password or passcode (which doesn’t change with each login), then you should be able to delete the feed and re-create it using this method.
There was a similar post in the announcement thread about the co-op bank.