Since these are not browser tests, we can create the user we want (and have multiuser):
`(self.user, _) = FacilityUser.objects.create(facility=Facility.objects.all()[0], username=self.username)`

If you prefer to grab existing users, I'd suggest grabbing from the `FacilityUser` list (will always exist if `ExerciseLogs` exists, may exist if `ExerciseLogs` don't)