Need help getting Model variables in registerMediaCollections

[AshPowell]

Hi, I feel like I'm missing something obvious here but I can't seem to query the current model variables inside of registerMediaCollections - not sure if the model isn't booted yet or something like that.

Here's my code -
` public function registerMediaCollections(): void
{
$filesAllowed = $this->plan->code != 'free' ? 5 : 1;

    $this->addMediaCollection('images')
        ->useDisk('s3')
        ->onlyKeepLatest($filesAllowed)
        ->registerMediaConversions(function (Media $media) {
            $this
                ->addMediaConversion('thumb')
                ->width(497)
                ->optimize();
        });
}`

Basically wanting to query if the user is on x plan then allow 5 images in the collection, else just allow one.

Thanks for any help - and apologies in advance I know it's something obvious but can't put my finger on it! 😂