Error when reloading page after unauthorized login: tornado.httpclient.HTTPClientError: HTTP 400: Bad Request

[philippgoehl]

Describe the bug
When using OAuth and logging in with an unauthorized user (tested using Google OAuth) at first an error message is displayed. When reloading the page the following Error Message (find below) is displayed.

To Reproduce
Steps to reproduce the behavior:

1. Use Google OAuth as authentication
2. Login with a Google Account that is unauthorized
3. Receiving an error message in the Flower UI
4. Reload the page
5. Error is thrown

Expected behavior
No Error? It was suggested to open an issue - so here it is :)

Error Message

flower   -> flower:2.0.0 tornado:6.4.1 humanize:4.11.0
software -> celery:5.4.0 (opalescent) kombu:5.4.2 py:3.12.6
            billiard:4.2.1 py-amqp:5.2.0
platform -> system:Linux arch:64bit
            kernel version:5.15.49-linuxkit-pr imp:CPython
loader   -> celery.loaders.app.AppLoader
settings -> transport:amqp results:disabled

deprecated_settings: None

Traceback (most recent call last):
  File "/usr/local/lib/python3.12/site-packages/tornado/web.py", line 1790, in _execute
    result = await result
             ^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/flower/views/auth.py", line 44, in get
    user = await self.get_authenticated_user(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/tornado/auth.py", line 987, in get_authenticated_user
    response = await http.fetch(
               ^^^^^^^^^^^^^^^^^
tornado.httpclient.HTTPClientError: HTTP 400: Bad Request

Kind regards!