- Implement kick functionality with add, remove, and check operations
- Add file management with create, request, and verify operations
- Update database schema with new tables and columns
- Enhance command handling in client module for new features
- Fix argument order in verify_password function
- Implement /ban and /unban commands for admins
- Add database functions to ban and unban users
- Update user verification to include ban status
- Remove unused get_user_by_username function
- Improve server logging and error handling
- Introduced `check_ban` and `get_ban_reason` functions in `db::users`
- Updated client handler to enforce ban checks during login
- Added detailed logging for ban status and reasons
Add user authentication with password hashing
- Integrated Argon2 for password hashing and verification
- Added bcrypt and thiserror dependencies
- Updated database schema with admin and ban flags
- Implemented user account creation and login logic
- Enhanced error handling for database operations
```
