What is the src of {{wf {invoices-folder} }} meant to do?
To my knowledge Webflow’s User Accounts ( WUA ) does not have any support for data-binding.
I built a library to capture and aggregate the logged in user info, including name, email, custom fields, and access groups, and make it available to your custom code for personalization.
{{wf ... }} syntax relates to Webflow’s custom embedded fields, which don’t exist here. It’s interesting to see how you’re trying to conflate them though.
wfu-bind is SA5’s data-binding attribute, and what you’re trying to do would work on something like e.g. a form input or plaintext;
<input wfu-bind="$user.data.invoices-folder">
Would be the right approach to initialize your input to that custom user value. However binding only works with form inputs ( binds value ) and plain text ( binds innerText ), not iframes.
You’d set your iframe src with javascript. Here are the SA5 docs you’re looking for