Perform more proper sign out operation

geneit_app/src/widgets/BaseAuthenticatedPage.tsx

@@ -43,9 +43,13 @@ export function BaseAuthenticatedPage(): React.ReactElement {
     setAnchorEl(null);
   };
 
-  const signOut = () => {
+  const signOut = async () => {
     handleCloseMenu();
-    AuthApi.SignOut();
+    try {
+      await AuthApi.SignOut();
+    } catch (e) {
+      console.error(e);
+    }
     navigate("/");
     auth.setSignedIn(false);
   };