Add dto and services

src/GameIdeas/GameIdeas.Shared/Dto/UserDto.cs

@@ -0,0 +1,13 @@
+using GameIdeas.Shared.Enum;
+
+namespace GameIdeas.Shared.Dto;
+
+public class UserDto
+{
+    public int? Id { get; set; }
+    public string? Username { get; set; }
+    public string? Password { get; set; }
+    public Role? Role { get; set; }
+    public IEnumerable<GameDto>? CreationGames { get; set; }
+    public IEnumerable<GameDto>? ModificationGames { get; set; }
+}