2818: Improve auth-related logging r=mergify[bot] a=nextgens
## What type of PR?
enhancement
## What does this PR do?
Improve auth-related logging
### Related issue(s)
- closes#2803
## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.
- [ ] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.
Co-authored-by: Florent Daigniere <nextgens@freenetproject.org>
Co-authored-by: Florent Daigniere <nextgens@users.noreply.github.com>
There's a traceback when the username used to log via SMTPAUTH
in is not an email address:
=== before ===
```
[...] ERROR in app: Exception on /internal/auth/email [GET]
Traceback (most recent call last):
File "/usr/lib/python3.9/site-packages/sqlalchemy/engine/base.py", line 1179, in _execute_context
context = constructor(dialect, self, conn, *args)
File "/usr/lib/python3.9/site-packages/sqlalchemy/engine/default.py", line 719, in _init_compiled
param.append(processors[key](compiled_params[key]))
File "/usr/lib/python3.9/site-packages/sqlalchemy/sql/type_api.py", line 1201, in process
return process_param(value, dialect)
File "/app/mailu/models.py", line 60, in process_bind_param
localpart, domain_name = value.lower().rsplit('@', 1)
ValueError: not enough values to unpack (expected 2, got 1)
[...]
[parameters: [{'%(140657157923216 param)s': 'foobar'}]]
```
=== after ===
```
[...] WARNING in nginx: Invalid user 'foobar': (builtins.ValueError) invalid email address (no "@")
```
