add note about "login methods" config

pages/hub/apps/guides/social-login.mdx

@@ -15,6 +15,7 @@ We use [privy.io](https://privy.io) as an authentication and key management prov
    - Configure chains. We recommend to use **Pimlico**:
      - Register at [their dashboard and copy API key](https://dashboard.pimlico.io/apikeys).
      - Return to privy page, press "Quick setup", select "Pimlico", paste API key and choose your primary app chain (Polygon, Gnosis, or Amoy, if you're setting up dev env).
+3. Go to **"Login methods"**, open **"Socials"** tab and enable methods you want.
 3. Go to **"Settings"** page and copy **`App ID`** of your project.
 
 You must have at least one chain configured, we recommend to use just one chain for smart wallets and hide chain switcher from UI for such users.