update App.js

 import React from "react";
-import GlobalStyles from "../Styles/GlobalStyles";
+import { gql } from "apollo-boost";
+import { useQuery } from "react-apollo-hooks";
 import { ThemeProvider } from "styled-components";
+import GlobalStyles from "../Styles/GlobalStyles";
 import Theme from "../Styles/Theme";
-import MenuBar from "./MenuList/MenuBar";
-import SubMenuBar from "./SubMenuList/SubMenuBar";
-import MainScreen from "./Main/MainScreen";
+import Router from "../Routes/Router";
+
+const QUERY = gql`
+  {
+    isLoggedIn @client
+  }
+`;
 
 export default () => {
+  const {
+    data: { isLoggedIn },
+  } = useQuery(QUERY);
+
   return (
     <ThemeProvider theme={Theme}>
       <>
         <GlobalStyles />
-        <MenuBar />
-        <SubMenuBar />
-        <MainScreen />
+        <Router isLoggedIn={isLoggedIn} />
       </>
     </ThemeProvider>
   );