ASP.NET Core Identity from Scratch: DB Context, Roles, Registering Users

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Learn how to set up ASP.NET Core Identity from scratch. In this video, I show you how to:
- Create a custom ApplicationUser with additional fields
- Configure the DbContext and run migrations
- Seed roles like Admin and Member
- Build a /register endpoint using minimal APIs
- Wrap Identity calls in a transaction for atomic user registration

By the end, you’ll understand the full Identity setup that most tutorials skip—giving you a clean, production-ready foundation for authentication and user management in ASP.NET Core.

Master Claims Transformation for Flexible ASP.NET Core Authorization
https://www.milanjovanovic.tech/blog/master-claims-transformation-for-flexible-aspnetcore-authorization

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Chapters
0:00 Creating the Identity DbContext
4:56 Migration for Identity tables, Roles
9:04 Register a user with Identity (UserManager)
13:31 Why you need a DB transaction