User entity

Implement AuthLogUserInterface on your User entity. It tells the bundle where to send the alert and how to address the user.

AuthLogUserInterface extends UserInterface, so you no longer need to declare it explicitly.

use Spiriit\Bundle\AuthLogBundle\Entity\AuthLogUserInterface;

class User implements AuthLogUserInterface
{
    // ... your existing User fields

    public function getAuthLogEmail(): string
    {
        return $this->email;
    }

    public function getAuthLogDisplayName(): string
    {
        return $this->name;
    }
}