## Is your feature request related to a problem?

We manage around 20 3rd party tools that our internal users can log into using G Suite (part of your enterprise / scale offering). When a user leaves, we need to disable their account. Currently we need to do this in G Suite and then any of the 3rd party tools where password login is still possible.

## Describe the solution you'd like

When a user leaves, we disable their account in G Suite and their account in PostHog becomes disabled too. Essentially, the ability to restrict specific users in PostHog to only be able to login via SSO (defaulting to this setting).

## Describe alternatives you've considered

Manually removing their account, and being the enemy of our IT manager.

## Additional context



#### *Thank you* for your feature request – we love each and every one!

posthog/api/test/test_signup.py
pass
    @pytest.mark.skip_on_multitenancy
    @patch("posthoganalytics.capture")
    def test_api_sign_up(self, mock_capture):
        
        Organization.objects.create(name="PostHog Internal Metrics", for_internal_metrics=True)
        response = self.client.post(
            "/api/signup/",
            {
                "first_name": "John",
                "email": "hedgehog@posthog.com",
                "password": "notsecure",
                "organization_name": "Hedgehogs United, LLC",
                "email_opt_in": False,
            },
        )
        self.assertEqual(response.status_code, status.HTTP_201_CREATED)
        user = cast(User, User.objects.order_by("-pk")[0])
        team = cast(Team, user.team)
        organization = cast(Organization, user.organization)
        self.assertEqual(
            response.json(),
            {
                "id": user.pk,
                "uuid": str(user.uuid),
                "distinct_id": user.distinct_id,
                "first_name": "John",
                "email": "hedgehog@posthog.com",
                "redirect_url": "/ingestion",