When I create an Asp.Net Core application with Authentication of Individual Users Accounts, it asks me for certain information:
Domain name
Application ID
Registration policy or login
What should I put in them?
This part is to configure (and you need these properties that the VS project wizard is requesting) which is the Azure Active Directory B2C is to centralize the authentication of users (so users are not validated against your app but against the AD B2C) and you in your app trust this service Take a look because up to 50,000 users is free to look at the prices ...
For that you should have an Azure account, but watch this part to register free! with an initial credit of $ 200 plus free services for 12 months But the most important thing ... this part:
50,000 users stored per month and 50,000 authentications per month with Azure Active Directory B2C this does not expire at 12 months is always so free! this amount
I was just going to put together an example of using this service, but until I have it available I leave you some links
I hope it will help or guide you