Fix the openInPopup type signature in the API table to include parameter types.

Author: ratracegrad

docs/content/2.usage/1.session.md

@@ -36,7 +36,7 @@ const { loggedIn, user, session, ready, fetch, clear, openInPopup } = useUserSes
 | `session` | `Ref<UserSession \| null>` | Full session object |
 | `fetch()` | `() => Promise<void>` | Refetch session from server |
 | `clear()` | `() => Promise<void>` | Clear session and remove cookie |
-| `openInPopup(route, size?)` | `() => void` | Open OAuth route in popup, auto-closes on success |
+| `openInPopup(route, size?)` | `(route: string, size?: { width?: number, height?: number }) => void` | Open OAuth route in popup, auto-closes on success |
 
 > **Important:** Nuxt Auth Utils uses `/api/_auth/session` for session management. Make sure your API middleware does not interfere with this path.