make sure to redirect user on github error

app/routes/auth/github/callback.tsx

@@ -1,10 +1,21 @@
-import { LoaderFunction } from "@remix-run/node";
+import { LoaderFunction, redirect } from "@remix-run/node";
 import config from "~/config";
 import { authenticator } from "~/services/auth.server";
 import { ensureUserCookie } from "~/shared/session";
+import { LOGIN_ERROR_CODES } from "~/shared/session/useLoginErrors";
 
 export const loader: LoaderFunction = async ({ request }) => {
   const { userId } = await ensureUserCookie(request);
+  const url = new URL(request.url);
+  const error = url.searchParams.get("error");
+  const error_description = url.searchParams.get("error_description");
+  if (error) {
+    return redirect(
+      `${config.loginPath}?error=${LOGIN_ERROR_CODES.LOGIN_GITHUB}&message=${
+        error_description || error
+      }`
+    );
+  }
   return authenticator.authenticate("github", request, {
     context: {
       userId,