You're right, it's a bit different use case than the instructions (yes,
I'm referring to the documentation you linked). I have a custom resource
called "generalCampaign" and in there I would like to update a field
called "emailConfirmed." I've set this up in the landing page
properties:I wasn't quite sure if the filter parameter should be
"email", guide didn't say anything about that. In addition I have a
transactional email linking to this landing page.