traceback google classroom api issue report

gistfile1.txt

Traceback (most recent call last):
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/flask/app.py", line 2464, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/flask_behind_proxy.py", line 25, in __call__
    return self.app(environ, start_response)
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/flask/app.py", line 2450, in wsgi_app
    response = self.handle_exception(e)
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/flask/app.py", line 1867, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/flask/app.py", line 2447, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/flask/app.py", line 1952, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/flask/app.py", line 1821, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/flask/app.py", line 1950, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/flask/app.py", line 1936, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/flask_login/utils.py", line 272, in decorated_view
    return func(*args, **kwargs)
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/fe.py", line 111, in edit_page
    modify_or_add_connection(
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/fe_managers.py", line 51, in modify_or_add_connection
    new_connection(uid, classId, webhook, db)
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/fe_managers.py", line 8, in new_connection
    regId, time = Classroom.from_uid(uid, db).register(classId)
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/classroom.py", line 52, in register
    o = self.service.registrations().create(body=body).execute()
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/googleapiclient/_helpers.py", line 134, in positional_wrapper
    return wrapped(*args, **kwargs)
  File "/home/karmanyaahm/Documents/code/other/server/google_classroom/.venv/lib/python3.8/site-packages/googleapiclient/http.py", line 907, in execute
    raise HttpError(resp, content, uri=self.uri)
googleapiclient.errors.HttpError: <HttpError 403 when requesting https://classroom.googleapis.com/v1/registrations?alt=json returned "The caller does not have permission">