I was having email issues so deleted the account and can't get it back
This is an older Mac running Catalina - no lectures please on the OS. Issues came about because I was potentially hacked and was trying to change my passwords. I was having email issues so deleted the account and when I tried to add it back, I got a "failed to authenticate with Yahoo, please try again" message. I tried the 3rd party password trick but then I get the invalid password message. Ideas?
[Re-Titled by Moderator]