some more stubs, remove old app

backend/src/sdk/store-sdk-stub.ts

@@ -3,9 +3,14 @@ const getSubscriptions = ( uid: string ) => {
         'id': 'com.janishutz.MusicPlayer.subscription',
         'expires': new Date().getTime() + 200000,
         'status': true
-    } ]
+    } ];
+}
+
+const configure = ( config: object ) => {
+
 }
 
 export default {
-    getSubscriptions
+    getSubscriptions,
+    configure
 }