Added user button and menu.

hooks/useDocumentClick.js

@@ -0,0 +1,13 @@
+import { useEffect } from 'react';
+
+export default function useDocumentClick(handler) {
+  useEffect(() => {
+    document.addEventListener('click', handler);
+
+    return () => {
+      document.removeEventListener('click', handler);
+    };
+  }, [handler]);
+
+  return null;
+}