def METHOD_NAME(self):
    settings = {"phone_number": "+4747474701"}
    DestinationConfigFactory(
        user=self.user1,
        media=Media.objects.get(slug="sms"),
        settings=settings,
    )
    response = self.user1_rest_client.post(
        path="/api/v1/auth/phone-number/",
        data=settings,
    )
    self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
    self.assertEqual(DestinationConfig.objects.filter(media_id="sms", settings=settings).count(), 1)