3 - Django chat app - Models
django-extensions — https://django-extensions.readthedocs.io/en/latest/
django-extensions — https://django-extensions.readthedocs.io/en/latest/
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Уведомления
django-extensions — https://django-extensions.readthedocs.io/en/latest/
django-extensions — https://django-extensions.readthedocs.io/en/latest/