diff --git a/packages/app/src/App.tsx b/packages/app/src/App.tsx
index 405e7e8..dc8ba91 100644
--- a/packages/app/src/App.tsx
+++ b/packages/app/src/App.tsx
@@ -35,6 +35,13 @@ export default function App() {
     towerDampening: 4
   });
 
+  const [fallback, setFallback] = useState<Pick<SkylineModelParameters, "name" | "year">>({
+    name: "Battlesquid",
+    year: new Date().getFullYear()
+  });
+
+  const [requestOk, setRequestOk] = useState(true);
+
   const [mobileOpened, { toggle: toggleMobile }] = useDisclosure();
   const [desktopOpened, { toggle: toggleDesktop }] = useDisclosure(true);
 
@@ -52,13 +59,30 @@ export default function App() {
   const [ready, setReady] = useState(false);
 
   useEffect(() => {
+    setRequestOk(true);
     setReady(
       localStorage.getItem("token") !== null
       && !result.fetching
     )
   }, [result.fetching]);
 
-  const appContent = ready
+  useEffect(() => {
+    if (result.data?.user) {
+      setFallback({
+        name: parameters.name,
+        year: parameters.year
+      });
+    } else {
+      setRequestOk(false);
+      setParameters({
+        ...parameters,
+        name: fallback.name,
+        year: fallback.year
+      })
+    }
+  }, [result.data]);
+
+  const content = ready
     ? (
       <>
         <Skyline
@@ -84,17 +108,15 @@ export default function App() {
     >
       <AppShell.Navbar p="md">
         <Sidebar
-          ready={ready}
+          authenticated={localStorage.getItem("token") !== null}
+          ok={requestOk}
           parameters={parameters}
           setParameters={setParameters}
-          onExport={() => {
-
-          }}
         />
       </AppShell.Navbar>
       <AppShell.Main style={{ height: "calc(100vh)", backgroundColor: theme.colors.dark[7] }}>
         <LoadingOverlay visible={result.fetching} zIndex={1000} overlayProps={{ radius: "sm", blur: 2 }} />
-        {appContent}
+        {content}
         <t.Out />
       </AppShell.Main>
     </AppShell >
diff --git a/packages/app/src/components/sidebar.tsx b/packages/app/src/components/sidebar.tsx
index 3d2f6d5..ae6108f 100644
--- a/packages/app/src/components/sidebar.tsx
+++ b/packages/app/src/components/sidebar.tsx
@@ -1,6 +1,6 @@
 import { AppShell, Button, Checkbox, ColorInput, Divider, NumberInput, Stack, TextInput, Tooltip } from "@mantine/core";
 import { SkylineModelParameters } from "../App";
-import { useState } from "react";
+import { useEffect, useState } from "react";
 import { useSceneStore } from "../scene";
 import { STLExporter } from "three/examples/jsm/Addons.js";
 
@@ -10,19 +10,30 @@ export interface GenerateOptions {
 }
 
 interface SidebarProps {
-    ready: boolean;
+    authenticated: boolean;
+    ok: boolean;
     setParameters: React.Dispatch<React.SetStateAction<SkylineModelParameters>>;
     parameters: SkylineModelParameters;
-    onExport(): void;
 }
 
 export function Sidebar(props: SidebarProps) {
-    const { ready, parameters, setParameters } = props;
+    const { authenticated, ok, parameters, setParameters } = props;
     const [name, setName] = useState(parameters.name);
     const [year, setYear] = useState(parameters.year);
+    const [modified, setModified] = useState(false);
     const { scene, dirty } = useSceneStore();
 
-    if (!ready) {
+    useEffect(() => {
+        setModified(false);
+    }, [ok]);
+
+    useEffect(() => {
+        if (!ok) {
+            setModified(true);
+        }
+    }, [name])
+
+    if (!authenticated) {
         return (
             <AppShell.Section h="100%">
                 <h2>skyline</h2>
@@ -46,6 +57,7 @@ export function Sidebar(props: SidebarProps) {
                         placeholder="Github Username"
                         value={name}
                         onChange={e => setName(e.target.value)}
+                        error={ok || modified ? "" : `Unable to find profile for "${name}".`}
                     />
                     <NumberInput
                         label="Year"