Update __init__.py

Just hit an error here, this should use getattr, not settings.get.
```
ipdb> settings.get()
*** AttributeError: 'Settings' object has no attribute 'get'

ipdb> type(settings)
<class 'django.conf.LazySettings'>

ipdb> getattr(settings, "DEBUG", "test")
True
```

https://code.djangoproject.com/ticket/10098