add user entity

backend/app/User/EloquentUserRepository.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace App\User;
+
+use App\Shared\ValueObject\EmailAddress;
+
+class EloquentUserRepository implements UserRepository
+{
+    public function create(CreateUserDto $dto): User
+    {
+        $model = UserModel::create([
+            'email' => $dto->email->value(),
+        ]);
+
+        return $this->toDomain($model);
+    }
+
+    public function find(int $id): ?User
+    {
+        $model = UserModel::find($id);
+        if ($model === null) {
+            return null;
+        }
+
+        return $this->toDomain($model);
+    }
+
+    private function toDomain(UserModel $model): User
+    {
+        return new User(
+            id: $model->id,
+            email: new EmailAddress($model->email),
+        );
+    }
+}