fix: block only students

Author: Ian2012

tutoraspects/templates/aspects/apps/superset/pythonpath/openedx_sso_security_manager.py

@@ -153,6 +153,11 @@ def get_courses(self, username, permission="staff", next_url=None):
             for course_id in next_courses:
                 courses.append(course_id)
 
+        # If the user has staff access to any courses, they are an instructor
+        if courses:
+            return courses
+        
+        # If the user has no staff access to any courses, they are a student
         if bool("{{SUPERSET_BLOCK_STUDENT_ACCESS}}"):
             raise Exception(f"User {username} is not an instructor")
         else: