Created core app.

core/admin.py

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+from django.contrib import admin
+
+# Register your models here.

core/apps.py

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+from django.apps import AppConfig
+
+
+class CoreConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "core"

core/models.py

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+from django.db import models
+
+# Create your models here.

core/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

core/views.py

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+from django.shortcuts import render
+
+# Create your views here.