Using EF Core 5 in course Build a Real-world App with ASP.NET Core 1.0+ and Angular 2+

Has anyone tried to use EF Core 5 in a course Build a Real-world App with ASP.NET Core 1.0+ and Angular 2+? If so, there’s no need to create an additional model for an intermediary table (VehicleFeature), cause it’s already included in EF Core. The problem I face is with Automapper part, where Mosh maps FeatureId, how can I overcome that without additional class such as VehicleFeature (I see no need for creating it and I’m sure there’s another way round). I try to google that, but it seems so specific and I have no ideas left.