Trouble using AspNetUsers table within Clean Architecture in Asp.net core web api 6.0

Question

We are migrating our ASP.NET Core 3.1 project to ASP.NET Core 6.0 Web API (clean architecture). https://github.com/jasontaylordev/CleanArchitecture

In our old project, we use IdentityUser (which is not in clean architecture) like this:

old project - User.cs

public class User : IdentityUser
{
    // removed
}  
// This is the table named as AspNetUser in the database 

Now, in our clean architecture project,

public class ApplicationUser : IdentityUser
{}

is inside the Infrastructure layer.

The database connection is in the domain layer (which is not dependent on any other layers).

In the domain layer, I have a User.cs class. This is same as User.cs in our old project. But I could not extends IdentityUser into my new User class. Because in clean architecture, we maintain Identity related files in Infrastructure Layer.

New project - User.cs

public  class User 
{
   // removed
}

My issue is I want to use a foreign key from the AspnetUser table to another class.

Example: FK_SiteUsers_AspNetUsers_UserId.

But ApplicationUser (which extends IdentityUser) is in the Infrastructure layer. Could not use this class into domain Layer in clean architecture

How can I do this? Please anyone help me. Thanks.