Is coffee bad for diabetes patient?

I went to decaf, I actually like the taste of it. I dont know if its the caffeine that is bad. I am a type 2 but I have not had any issue with blood sugar. Funny thing when I was first diagnosed and I was in ICU and in the regular room they would bring me a cup of coffee for breakfast. I guess better than drinking juice or milk. I just need a few zips anyway to get by. I switch to coffee to stop drinking beer, then I switched to tea to lower the amount of coffee that I was drinking. O well that’s life. Take care