add find by email to user repository

app/User/UserRepository.php

@@ -3,9 +3,11 @@
 namespace App\User;
 
 use App\User\UseCases\CreateUserDto;
+use App\ValueObjects\EmailAddress;
 
 interface UserRepository
 {
     public function create(CreateUserDto $dto): User;
     public function find(int $id): ?User;
+    public function findByEmail(EmailAddress $email): ?User;
 }