Fix issues with basePath.

pages/logout.js

@@ -1,12 +1,13 @@
 import { useEffect } from 'react';
 import { useRouter } from 'next/router';
+import { get } from 'lib/web';
 
 export default function LogoutPage() {
   const router = useRouter();
   const { basePath } = router;
 
   useEffect(() => {
-    fetch(`${basePath}/api/auth/logout`).then(() => router.push('/login'));
+    get(`${basePath}/api/auth/logout`).then(() => router.push('/login'));
   }, []);
 
   return null;