student account will now be disabled upon creation

util/importer.py

@@ -134,7 +134,7 @@ def load_hektor_json():
             log.warning(f"Updated submission type {submission_type}")
 
     for student in exam_data['students']:
-        student_obj = user_factory.make_student(exam=exam,
+        student_obj = user_factory.make_student(exam=exam, is_active=False,
                                                 **student).student
         for submission_obj in student['submissions']:
             add_submission(student_obj, **submission_obj)