refactor: optional route

src/routes/index.tsx

@@ -87,10 +87,7 @@ const PageRoutes = () => {
           }
         >
           <Route index element={<LazyIt><RegPage /></LazyIt>} />
-          <Route path="set_name">
-            <Route index element={<LazyIt><RegWithUsernamePage /></LazyIt>} />
-            <Route path=":from" element={<LazyIt><RegWithUsernamePage /></LazyIt>} />
-          </Route>
+          <Route path="set_name/:from?" element={<LazyIt><RegWithUsernamePage /></LazyIt>} />
         </Route>
         <Route
           path="/email_login"

src/routes/reg/RegWithUsername.tsx

@@ -25,7 +25,6 @@ const RegWithUsername: FC = () => {
   const dispatch = useDispatch();
   const [username, setUsername] = useState("");
   const query = new URLSearchParams(location.search);
-  // const githubCode = query.get("gcode");
   // todo: check if query param exists
   const token = query.get("magic_token") as string;
   useEffect(() => {