<filename>listings/apps.py
from django.apps import AppConfig


class ListingsConfig(AppConfig):
    default_auto_field = 'django.db.models.AutoField'
    name = 'listings'

<filename>listings/apps.py
from django.apps import AppConfig


class ListingsConfig(AppConfig):
    default_auto_field = 'django.db.models.AutoField'
    name = 'listings'
