get_system_username silently returns empty string on failure

[Shashank Kushwaha]

The function get_system_username() silently returns an empty string when exceptions occur (ImportError, KeyError, OSError).

This may make debugging difficult and can lead to unexpected downstream behavior where an empty username is treated as valid.

### Expected behavior

It might be helpful to at least log this situation (e.g., at debug level) to improve visibility.

### Context

This behavior occurs in environments where getpass.getuser() fails (e.g., restricted systems or missing passwd entries).

[Shashank Kushwaha]

Hi, I’d like to work on this issue. I’ll submit a patch soon.

[Shashank Kushwaha]

Hi, I have submitted a PR to address this issue.

GitHub PR: ​https://github.com/django/django/pull/20982

This adds debug logging when get_system_username() fails, improving visibility without changing behavior.

Feedback is welcome. Thanks!

[Mariusz Felisiak]

We are talking about management command used rarely by users. I see no value is raising an exception or adding a logger here. This is not something that will not be noticed when executing a command.