http://uwcryspionvholmkfxoqt2xns5mvnct34ytacugxtqpqrnka2oqm6kqd.onion/courses/data-sp/F24/syllabus.html
If question doesn't exist and it involves private content (query about grades, partial progress towards solution), then create a private question that is only visible to the instructors and TAs. (The instructor(s) or TAs may make a private question public, possibly after editing it, if they decide that it is of general interest.) Otherwise, in general, create a public one so that your peers can benefit too.