New form question type: approver

Depending on the resource our users are requesting via a form, they need different approvers.

It would be nice if the user could select an approver from a dropdown list of approvers when creating a ticket via forms.

Right now the only option is to list all the GLPI user objects, but I only need the ones with approval role.

A solution could be a filter/pre-selector for the user objects when creating the form, or a new approver question type, so the end-users can only select the proper users objects when creating the ticket.