Fix claims.

Use OID instead of email for microsoft identifier.
Fix PlayerCount route.
Add created date to user table.
Create spectator icon.

Shogi.Api/Models/User.cs

@@ -11,7 +11,7 @@ public class User
   public static readonly ReadOnlyCollection<string> Subjects = new(new[] {
     "Hippo", "Basil", "Mouse", "Walnut", "Minstrel", "Lima Bean", "Koala", "Potato", "Penguin", "Cola", "Banana", "Egg", "Fish", "Yak"
   });
-  public static User CreateMsalUser(string id) => new(id, id, WhichLoginPlatform.Microsoft);
+  public static User CreateMsalUser(string id, string displayName) => new(id, displayName, WhichLoginPlatform.Microsoft);
   public static User CreateGuestUser(string id)
   {
     var random = new Random();