How to use the smartmin.users.models.PasswordHistory.objects.create function in smartmin

def test_expiration(self):
        # create a fake password set 90 days ago
        ninety_days_ago = timezone.now() - timedelta(days=90)
        history = PasswordHistory.objects.create(user=self.plain,
                                                 password=self.plain.password)

        history.set_on = ninety_days_ago
        history.save()

        # log in
        self.client.logout()
        post_data = dict(username='plain', password='Password1 ')
        response = self.client.post(reverse('users.user_login'), post_data, follow=True)

        # assert we are being taken to our new password page
        self.assertTrue('form' in response.context)
        self.assertTrue('new_password' in response.context['form'].fields)

        # try to go to a different page
        response = self.client.get(reverse('blog.post_list'), follow=True)

def testNoExpiration(self):
        # create a fake password set 90 days ago
        ninety_days_ago = timezone.now() - timedelta(days=90)
        history = PasswordHistory.objects.create(user=self.plain,
                                                 password="asdfasdf")

        history.set_on = ninety_days_ago
        history.save()

        # log in
        self.client.logout()
        post_data = dict(username='plain', password='Password1 ')
        response = self.client.post(reverse('users.user_login'), post_data, follow=True)
        self.assertTrue(response.context['user'].is_authenticated)

        # we shouldn't be on a page asking us for a new password
        self.assertFalse('form' in response.context)

def testPasswordRepeat(self):
        history = PasswordHistory.objects.create(user=self.plain,
                                                 password=self.plain.password)

        with self.settings(USER_PASSWORD_REPEAT_WINDOW=365):
            self.assertTrue(PasswordHistory.is_password_repeat(self.plain, "Password1 "))
            self.assertFalse(PasswordHistory.is_password_repeat(self.plain, "anotherpassword"))

            # move our history into the past
            history.set_on = timezone.now() - timedelta(days=366)
            history.save()

            # still a repeat because it is our current password
            self.assertTrue(PasswordHistory.is_password_repeat(self.plain, "Password1 "))

            # change our password under the covers
            self.plain.set_password("my new password")

def post_save(self, obj):
            obj = super(UserCRUDL.Profile, self).post_save(obj)
            if 'new_password' in self.form.cleaned_data and self.form.cleaned_data['new_password']:
                FailedLogin.objects.filter(user=self.object).delete()
                PasswordHistory.objects.create(user=obj, password=obj.password)

            return obj

def post_save(self, obj):
            """
            Make sure our groups are up to date
            """
            if 'groups' in self.form.cleaned_data:
                obj.groups.clear()
                for group in self.form.cleaned_data['groups']:
                    obj.groups.add(group)

            # if a new password was set, reset our failed logins
            if 'new_password' in self.form.cleaned_data and self.form.cleaned_data['new_password']:
                FailedLogin.objects.filter(user=self.object).delete()
                PasswordHistory.objects.create(user=obj, password=obj.password)

            return obj