Hi Clickstudios,
I think this is a good feature, as most of our clients also would like to have this feature.
other than username and password, we could add additional field that can autofill a custom field
example: a website would require username, password and account.
users can create a entry on passwordlist to add additional field and add the corresponding fieldID sample:<accntid> on the website.
I placed a sample screenshot below.