Cannot get login & security working

Radzen's built-in security relies on ASP.NET Core Identity. The latter uses a predefined database schema by default. It is possible to implement a custom ASP.NET Core Identity provider that uses existing tables. Here is a forum thread which discusses this.

P.S. I have deleted a forum thread which was a duplicate of this one. Please do not post duplicate threads. They will not lead to a faster response (or any response at all).