UserLoggedInEvent nor PostLoginEvent is emitted for user logins

Steps to reproduce

1. Configure SAML via AzureAD
2. Configure auto_groups to assign groups automatically to every user
3. Login with account via AzureAD SSO

Expected behaviour

User logs in to nextcloud, gets groups assigned automatically.

Actual behaviour

User logs in successfully but no groups are assigned

Server configuration

Operating system: CentOS 8
Web server: Nginx
Database: PostgreSQL 12.3
PHP version: 7.3.17
Nextcloud version: 18.0.4
Where did you install Nextcloud from: Linuxserver/nextcloud via docker hub

List of activated apps:
Nextcloud_apps.txt

Nextcloud configuration:
Nextcloud_configuration.txt

Client configuration

Browser: Firefox 76.01 & Chrome 83.0.4103.61
Operating system: Windows 10

Logs

Nextcloud log (data/owncloud.log)

nextcloud.log

Related issue

I have created a relatable issue with the other app, after coming to the conclusion it's probably this app causing the bug I raised the issue here. See: https://github.com/stjosh/auto_groups/issues/42

The other app checks for UserLoggedInEvent or PostLoginEvents however this app apparently does not emit it.

Start by tracing the SAML login flow and comparing it with the UserLoggedInEvent and PostLoginEvent expectations described in the issue. Reproduce the AzureAD SSO login with auto_groups enabled, then verify that the relevant event is emitted and that automatic group assignment occurs.