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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def StoreCSRFCookie(user, response):
 """Decorator for WSGI handler that inserts CSRF cookie into response."""


  csrf_token = GenerateCSRFToken(user, None)
  response.set_cookie(
      "csrftoken", csrf_token, max_age=CSRF_TOKEN_DURATION.seconds)