AOL account won't add in Sierra

My AOL account stopped working suddenly. I have removed it form mail preferences and tried adding it on but now I am running into issue of Mac not being able to verify account and password. The account and password is correct, I quadruple-checked and even changed it to make sure I am typing correct information. I cleared all old key chain entries, ran anti-malware program, removed two-factor authentication form aol account and I am still unable to add AOL. HELP!!!!!!!!!!