Notify_push Invalid credentials warning

Nextcloud version: 25.0.1
Operating system and version: Ubuntu 20.04
Apache or nginx version: Apache 2.4.41
PHP version: 8.1

The issue you are facing:

I have set up notify_push, and everything seems to be working, except I see logged errors regarding Invalid credentials.

For example, the notify_push service reports the following error:

notify_push[893018]: [2023-01-05 12:06:47.231317 +00:00] WARN [notify_push::connection] src/ Invalid credentials

Here is the output of occ notify_push:setup

$ sudo -u www-data php /var/www/nextcloud/occ notify_push:setup
This setup wizard is intended for use on single server instances
where the nextcloud server, web server/reverse proxy and push daemon all run on the same machine.
If your setup is more complex or involves any kind of load balancing
you should follow the manual setup instruction on the README instead
Press enter to continue or ESC to cancel...

Push binary seems to be running already
✓ push server seems to be functioning correctly.
Reverse proxy seems to be configured already
✓ reverse proxy seems to be setup correctly.
  configuration saved

and of occ notify_push:self-test

$ sudo -u www-data php /var/www/nextcloud/occ notify_push:self-test
✓ redis is configured
✓ push server is receiving redis messages
✓ push server can load mount info from database
✓ push server can connect to the Nextcloud server
✓ push server is a trusted proxy
✓ push server is running the same version as the app

and of occ notify_push:metrics

$ sudo -u www-data php /var/www/nextcloud/occ notify_push:metrics
Active connection count: 5
Total connection count: 6
Total database query count: 1
Events received: 5
Messages sent: 0

Also worth noting I have set up the nextcloud instance to use SAML login, but haven’t required SAML for clients (yet).

is there any way to see what user supplied invalid credentials?

I realised you got more info if you change the log level, as described in the github docs for notify_push