add auth sessions

backend/app/Auth/CreateSessionDto.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Auth;
+
+use App\User\User;
+use DateTimeImmutable;
+
+final readonly class CreateSessionDto
+{
+    public function __construct(
+        public string $token,
+        public User $user,
+        public DateTimeImmutable $createdAt,
+        public DateTimeImmutable $expiresAt,
+    ) {}
+}