input: Write a function to create a Django application with a model that stores the name, address, and email of a user. The function should return the string "Django app created and migrated" after successfully setting up the Django app and migrating the models.
  
  assert create_django_app()=="Django app created and migrated"
output: def create_django_app():
      import os
      from django.core.management import call_command
      from django.db import models
      from django.apps import AppConfig
  
      class UserAppConfig(AppConfig):
          name = 'user_app'
  
      class User(models.Model):
          name = models.CharField(max_length=100)
          address = models.CharField(max_length=200)
          email = models.EmailField()
  
      os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'project.settings')
      call_command('startapp', 'user_app')
      call_command('makemigrations')
      call_command('migrate')
      
      return "Django app created and migrated"