TaskCreated::addUserToRecepients

private function addUserToRecepients(array $recepients, User $user): array
{
	foreach ($recepients as $recepient)
	{
		if ($recepient->getId() === $user->getId())
		{
			// already exists
			return $recepients;
		}
	}

	$recepients[] = $user;

	return $recepients;
}