creating a field that'll send an email if checked but that isn't stored anywhere in the DB

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For my User CRUD I'd like to add a "Send a New User Email with a randomly generated password" checkbox that does exactly what it says. This checkbox would be checked by default but could be unchecked if you stealthily wanted to add a user (eg. maybe you're trying to add an inactive user but you still need a record of them for reporting purposes or whatever).

My question is... how would I do this in a CRUD?

https://backpackforlaravel.com/docs/6.x/crud-fields#optional-fake-field-attributes-stores-fake-attributes-as-json-in talks about fake fields but those fields seem to be for saving data in a JSON column vs using them to conditionally trigger an action.

I mean, I suppose it could be stored in the DB but storing it in the DB seems a bit pointless to me...

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I was able to achieve this by building off of the following link:

https://backpackforlaravel.com/docs/6.x/crud-operation-create#override-the-store-method

Here's the field I added:

        CRUD::field([
            'name'  => 'sendEmail',
            'label' => 'Send a <a tabindex="-1" href="/admin/setting/0/edit#new-user-email" target="_blank">New User Email</a> with a randomly generated eight character alpha-numeric password',
            'type'  => 'checkbox',
            'default' => 1,
            'attributes' => ['tabindex' => '-1'],
        ]);

And here's my store function:

public function store()
{
    $request = $this->crud->getRequest();
    $email = $request->input('email', '');
    $sendEmail = $request->input('sendEmail', '0') == '1';
    // do something before validation, before save, before everything
    $response = $this->traitStore();
    // do something after save
    if ($sendEmail) {
        $user = User::where('email', $email)->first();
        self::sendWelcomeEmail($user);
    }

    return $response;
}