text: from django.contrib.auth.models import User
  from django.db.models.signals import post_save
  from django.dispatch import receiver
  from kitsune.customercare.tasks import update_zendesk_user
  from kitsune.users.models import Profile
  
  
  @receiver(
      post_save, sender=User, dispatch_uid="customercare.signals.on_save_update_zendesk_user.User"
  )
  @receiver(
      post_save,
      sender=Profile,
      dispatch_uid="customercare.signals.on_save_update_zendesk_user.Profile",
  )
  def on_save_update_zendesk_user(sender, instance, update_fields=None, **kwargs):
      # TODO: dedupe signals, so calling
      # ```
      # user.profile.save()
      # user.save()
      # ```
      # doesn't update the user in zendesk twice
  
      user = instance
      if sender == Profile:
          user = instance.user
          if update_fields and len(update_fields) == 1 and "zendesk_id" in update_fields:
              # do nothing if the only thing updated is the zendesk_id
              return
  
      try:
          if user.profile.zendesk_id:
              update_zendesk_user.delay(user.pk)
      except Profile.DoesNotExist:
          pass
  