text: from django.contrib.auth.tokens import PasswordResetTokenGenerator
  from six import text_type
  
  
  class TokenGenerator(PasswordResetTokenGenerator):
      def _make_hash_value(self, user, timestamp):
          return (text_type(user.is_active)+text_type(user.pk)+text_type(timestamp))
  
  
  account_activation_token = TokenGenerator() 