Critical bug in authentication module

This is a critical syntax bug in the authentication module affecting production.

**Labels:**
- `priority:critical` - Requires immediate attention
- `type:bug` - Bug fix needed
- `area:auth` - Related to authentication
- `bug:syntax` - Syntax error
- `complexity:small` - Quick fix expected
- `impact:production` - Affecting production environment
- `good-first-issue` - Suitable for new contributors