Welcome to the Idox cloudscribe identity server demo root site. It includes Identity Server 4, configured to provide authentication to two client websites that are also created with cloudscribe (in fact the client sites are identical to the server site in terms of code, but deployed as a separate website in IIS, with two tenants configured).
The first client site is here.
The second client site is here.
This site is configured to allow registering and logging in directly (creating an account with username, email and password) or using your Google account, or via Azure AD (but NB this is an Azure account run by Crispin for a small charity so it won't work for anyone else - it's proof of concept only).