Verify certificate provider medium

Reviewed By: antonk52

Differential Revision: D33917041

fbshipit-source-id: 91a9554397063d53a903a5b1406b46ddf07360b2

desktop/flipper-server-core/src/fb-stubs/WWWCertificateProvider.tsx

@@ -11,6 +11,8 @@ import {KeytarManager} from '../utils/keytar';
 import CertificateProvider from '../utils/CertificateProvider';
 
 export default class WWWCertificateProvider extends CertificateProvider {
+  name = 'WWWCertificateProvider';
+  medium = 'WWW' as const;
   constructor(private keytarManager: KeytarManager) {
     super();
   }