Graphql - exposing Member

Questions
1

Silverstripe Version:
SS4.4.4
Question:
When I tried to expose Member, I got below error when I ran flush

[Emergency] Uncaught Exception: No fields or nestedQueries defined for SilverStripe\Security\Member

What I did was to give Member class an extension:

class MemberExension extends DataExtension implements ScaffoldingProvider

and YML like below

SilverStripe\GraphQL\Manager:
  schemas:
    default:
      scaffolding_providers:
        - App\Web\Model\Supplier
        - SilverStripe\Security\Member
      scaffolding:
        types:
          SilverStripe\Security\Member:
            fileds: [ID, FirstName, Surname, Email]
            operations:
              read: true
          App\Web\Model\Supplier:
            fields: [ID, Title]
            operations:
              read: true
              create: true

Not sure what goes wrong - I suspect that I can’t implement ScaffoldingProvider on the extension? Because the same technique I used on App\Web\Model\Supplier and that works with no problem.

Any idea?

ps: and also, sub classes of SilverStripe\Security\Member are having the same issue :confused:

Cheers
Leo