What problem are you trying to solve with Submitty
currently all students in our sample data are either of type 'graded' (with non null registration section) or NULL section (still with type 'graded')

We need sample students who are of the other registration types, 'withdrawn' and 'audit' (with non-null registration section). withdrawn students were initially in the course, but officially withdrew from the course (and will no longer submit work or participate in the course). However since it is past the deadline for dropping the course, they will still be on the instructors class list. But we would like to remove them from the TA views.

Just a few students in each of these categories is sufficient. This will allow us to write tests of the TA grading statistics that omit these students from metrics on number of students submitted, number of submitted assignments that were manually graded, and average scores.

This is related to issue #8319 and #11007 and PR #11036