Add private key user info to settings page.

src/app/_services/auth.service.ts

@@ -211,4 +211,8 @@ export class AuthService {
   getPrivateKey(): any {
     return this.mutableKeyStore.getPrivateKey();
   }
+
+  getPrivateKeyInfo(): any {
+    return this.getPrivateKey().users[0].userId;
+  }
 }