2023-08-04 ECA Sprint: Access to form fields with tokens

[Access to form fields with tokens](https://ecaguide.org/library/forms/access_to_form_fields_with_tokens/) This model demonstrates how to access form field values during validation or submission, how to find out the proper token syntax for each form field type, and also an alternative approach by building a temporary entity from form field values to use the more transparent entity token syntax.