In our web application, the user authentication is done by a 3rd party OIDC login server that we don't have full control over. At the end of the login process, there is a redirect back to the monitored app like this: https://myapp.com/#id_token=abc123xyz .
I'd like to create a custom metric to count logins, based on the presence of #id_token in the URL. Since it's a bookmark link, it's in the action details but it doesn't go to the webserver, only visible from the client side. I couldn't find an obvious way to filter based on the presence of a fragment name?