Getting Due Date for all Assignments

Is there any way to get all assignments and their due dates for a district or at least a school? I can't find any way to do so through the API or a manual export process. I know there's the Assignment Report, but it's unfortunately not very helpful as it only exports to a PDF. If could be exportable in a tabular format like a CSV file, it might be helpful.

Any suggestions on getting Assignments' Due Dates out of Illuminate would be very useful.