How can I get the uploaded file before saving data

class CreateCustomer extends CreateRecord
{
    protected static string $resource = CustomerResource::class;
}

Select::make('group_id')->translateLabel()
      ->options(Group::pluck('name', 'id'))
      ->searchable()
      ->hiddenOn(['edit'])
      ->required(),
TextInput::make('phone')->translateLabel()
       ->required()
       ->maxLength(191),
TextInput::make('email')->translateLabel()
      ->email()
      ->maxLength(191),
FileUpload::make('identity'),