Implement all car endpoints

src/WebApi/Users/User.cs

@@ -0,0 +1,10 @@
+using Vegasco.WebApi.Cars;
+
+namespace Vegasco.WebApi.Users;
+
+public class User
+{
+	public string Id { get; set; } = "";
+
+	public virtual IList<Car> Cars { get; set; } = [];
+}