input: Write a function to create a Django application that includes a model to store user details such as name, address, and email. The function should return the Django code for setting up the model.
  
  assert create_django_model() == """
  # create user model
  from django.db import models
  
  class User(models.Model): 
      name = models.CharField(max_length=100) 
      address = models.CharField(max_length=100)
      email = models.EmailField(max_length=100)
  """
  
  assert create_django_model() != ""
  assert create_django_model().startswith("# create user model")
  assert "class User(models.Model)" in create_django_model()
  assert "name = models.CharField(max_length=100)" in create_django_model()
  assert "address = models.CharField(max_length=100)" in create_django_model()
  assert "email = models.EmailField(max_length=100)" in create_django_model()
output: def create_django_model():
      return """
  # create user model
  from django.db import models
  
  class User(models.Model): 
      name = models.CharField(max_length=100) 
      address = models.CharField(max_length=100)
      email = models.EmailField(max_length=100)
  """