Why AddIdentityApiEndpoints<TUser>() is not available in the Infrastructure layer

When trying to use AddIdentityApiEndpoints<TUser>() in the Infrastructure layer, you might encounter errors because this method is specifically designed for Minimal APIs in .NET 8 and is not accessible from class libraries like Infrastructure. In other side, you may notice that you can access to AddIdentityCore<TUser>() or AddIdentity<TUser>() methods with only the package Microsoft.AspNetCore.Identity.EntityFrameworkCore installed in your Domain or Infrastructrue layer.

Why does this happen?

• AddIdentityCore<TUser>() is part of the Microsoft.AspNetCore.Identity package and is available in all ASP.NET Core projects, including class libraries like Infrastructure.

• AddIdentityApiEndpoints<TUser>(), however, is part of the Minimal API feature in .NET 8 and is only available in ASP.NET Core Web Applications. It depends on the Microsoft.AspNetCore.App framework, which isn't included in class libraries.

Solution

To maintain a clean architecture, you should:

1. In the Infrastructure layer, configure Identity Core and Entity Framework.

   services.AddIdentityCore<IdentityUser>().AddEntityFrameworkStores<ApplicationDbContext>();

2. In your project web Api layer, configure the API endpoints (via AddIdentityApiEndpoints).

   builder.Services.AddIdentityApiEndpoints<IdentityUser>();

Conclusion

• AddIdentityApiEndpoints<TUser>() can only be used in ASP.NET Core Web Applications.

• Infrastructure should only handle the service configuration, while Web API layer should expose the endpoints.

This maintains a clean and modular architecture.