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My new book ASP.NET Core in Action, Third Edition is available now! It supports .NET 7.0, and is available as an eBook or paperback.

Debugging JWT validation problems between an OWIN app and IdentityServer4
This post describes an issue that arose migrating from IdentityServer3 to IdentityServer4, where an OWIN app cannot validate a JWT issued by IdentityServer4…

Customising ASP.NET Core Identity EF Core naming conventions for PostgreSQL
In this post I'll describe how to configure EF Core to use snake_case for database object names instead of Camel Case, so they work better with PostgreSQL.…

Creating a validator to check for common passwords in ASP.NET Core Identity
In this post, I introduce a package for ASP.NET Core Identity that lets you validate a user hasn't used one of the most common 100,000 passwords.…

Creating custom password validators for ASP.NET Core Identity
In this post, I describe the password validation settings for ASP.NET Core Identity, how to customise them, and how to write a custom password validator.…

