Filament Importer skip import row if certain conditions is true

protected function beforeValidate(): void 
    {
        $user = User::where('email', $this->data['email'])->first();
            if ($user) {
                Notification::make()
                    ->danger()
                    ->title('User already exist')
                    ->body('This email has already been used for a user on the platform')
                    ->persistent()
                    ->send();

                $this->action->halt();
            }
    }