Got Universal Control to finally work. Don't forget to Sign out and sign back in your account!

I picked up an ipad air M1 and wanted to try some of the newer features on my 2015 MBP such as universal control. I went through the Githubs and forums and I could NEVER get it to work. It was driving me crazy! It wasn't until I logged out and logged back in on my apple account that it finally worked! Just FYI for anyone else struggling to get this to work. The iPAD makes a great second screen with universal control! Sidecar is very choppy on my 2015 MBP