AITA if I don’t provide the code my boss needs after they fired me?

I got fired / laid off 3 months ago. They made it look like a lay off because they wanted someone with more expertise than a senior manager more like a director level and there was nothing I could do. I knew that was a BS excuse as they hired a junior level who was trained to fill my position. My last two weeks my boss didn’t even ask for anything, he avoided any communication and directed me to HR if I wanted communication. No exit or off boarding was done as he considered himself overqualified to do an off boarding with me. Fast forward 3 months after my last day I receive a message from him trying to log in to one of the systems and because of the 2 step verification the second step comes to my phone. He tried like 2 days and then reached out to me like nothing and wanted me to provide the code. I ignored it completely but now I am wondering if I should have given the code to him ??!!

EDIT- I did say system but it is not a system where you have a license it’s more like a website where I created an account to pay the states quarterly. Anyone from my company can create a new account if they provide EIN and some security questions. He is just trying to use my username and password.