## 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/utils.py
output: Dict[str, bool] = {
        "github": bool(settings.SOCIAL_AUTH_GITHUB_KEY and settings.SOCIAL_AUTH_GITHUB_SECRET),
        "gitlab": bool(settings.SOCIAL_AUTH_GITLAB_KEY and settings.SOCIAL_AUTH_GITLAB_SECRET),
        "google-oauth2": False,
        "saml": False,
    }
    
    bypass_license: bool = settings.MULTI_TENANCY
    license = None
    try:
        from ee.models.license import License
    except ImportError:
        pass
    else:
        license = License.objects.first_valid()
    if getattr(settings, "SOCIAL_AUTH_GOOGLE_OAUTH2_KEY", None) and getattr(
        settings, "SOCIAL_AUTH_GOOGLE_OAUTH2_SECRET", None,
    ):
        if bypass_license or (license is not None and AvailableFeature.GOOGLE_LOGIN in license.available_features):
            output["google-oauth2"] = True
        else:
            print_warning(["You have Google login set up, but not the required license!"])
    if getattr(settings, "SAML_CONFIGURED", None):
        if bypass_license or (license is not None and AvailableFeature.SAML in license.available_features):
            output["saml"] = True
        else:
            print_warning(["You have SAML set up, but not the required license!"])
    return output
def flatten(i: Union[List, Tuple]) -> Generator: