How to configure the field to match

I use a library system that has as a user/password a single entry. Neither the user or password fields in Bitwarden can use to enter in the field on the page. I’ve tried to enter in a new field but it does not match anyway.
On the form the login text box is labeled “Please enter in your Library Card Number” then the text box and a login button.

Nothing works Any suggestions??
URL Attached Login to Library

Follow the instructions I gave to another forum member here:

In the last step, enter the value user as the name of the custom field.

This should work, as long as the Username field in your vault item contains the Library Card Number.