private function withConfirmationSpecification($user)
    {
        (new EnableUserCommandBuilder($this->container, $this->persistence))->build($user);

        return [
            'command'          => WithConfirmationSignUpUserCommand::class,
            'handler'          => WithConfirmationSignUpUserHandler::class,
            'handlerArguments' => $this->handlerArguments($user),
        ];
    }