gtag('set', {'user_id': 'USER_ID'}); // Set the user ID using signed-in user_id.
ga('set', 'userId', 'USER_ID'); // Set the user ID using signed-in user_id.
I'm assuming you're referring to a PDF document related to K Kumar Wadhwa, possibly a biography, notes, or other written content. However, I need more context to provide a complete post.
