lbl_Name.Text = $"USER: {UserSearch.Value.FullName}\n\tFollowers: {UserSearch.Value.FollowersCount} \n\tVerified {UserSearch.Value.IsVerified}";
If you're still getting a null reference then something you are referencing (something before a "." like lbl_Name for lbl_Name.Text) is null. We can't tell you that from here, you'll need to use the debugger to figure out what is null, and then why it is null, and from that decide what to do when it is null.