finish fixing router

packages/router/src/utils/use_router_internal.rs

@@ -12,16 +12,14 @@ use crate::prelude::*;
 /// - Otherwise [`Some`].
 pub(crate) fn use_router_internal() -> Option<RouterContext> {
     let router = use_hook(consume_context::<RouterContext>);
+    let id = current_scope_id().expect("use_router_internal called outside of a component");
     use_on_destroy({
         to_owned![router];
         move || {
-            let id = current_scope_id().expect("use_router_internal called outside of a component");
-
             router.unsubscribe(id);
         }
     });
     use_hook(move || {
-        let id = current_scope_id().expect("use_router_internal called outside of a component");
         router.subscribe(id);
 
         Some(router)