Different Sidebar Content for each Author

I know the title makes it sound simple – and technically, I bet it really is. But I cannot for the life of me figure out how to do this. My site has two writers. I have a twitter account, my partner does not. Therefore, I want the sidebar on my single posts to display my latest tweet. But not on hers.

I tried things like “if author_id(4)” and whatnot, but couldn’t get it to work. Any help would be appreciated.

I typically know my way around it pretty well – I built my entire theme from scratch. You can come check it out here: https://spacebrew.com. But I can’t figure this out and it’s driving me crazy. Thanks!