Add JwtService

AMessanger.Core/Abstraction/IJwtService.cs

@@ -0,0 +1,8 @@
+using AMessanger.Core.Models;
+
+namespace AMessanger.Core.Abstraction;
+
+public interface IJwtService
+{
+    public string GenerateToken(User user);
+}

AMessanger.Core/Models/User.cs

@@ -0,0 +1,8 @@
+namespace AMessanger.Core.Models;
+
+public class User(Guid id, string name, string hashedPassword)
+{
+    public Guid Id { get; private set; } = id;
+    public string Name { get; set; } = name;
+    public string HashedPassword { get; set; } = hashedPassword;
+}