refactored for use with EFcore

api/Domain/Person.cs

@@ -1,12 +1,15 @@
+using System.ComponentModel.DataAnnotations;
+
 namespace api.Domain;
 
 public sealed class Person
 {
-    public string Username { get; }
+    [Key]
+    public string Username { get; private set; }
 
-    public string RealName { get; }
+    public string RealName { get; private set; }
 
-    public DateOnly Birthday { get; }
+    public DateOnly Birthday { get; private set; }
 
     private Person(string username, string realName, DateOnly birthday)
     {