About two months or three ago I stupidly changed my password to my only account to a password I promptly forgot. I was losing it when I realized what I had done

About two months or three ago I stupidly changed my password to my only account to a password I promptly forgot. I was losing it when I realized what I had done. To make matters worse, I did this change a day before our office was scheduled to move to automated backups via Time Machine. Luckily after some digging I came across this fix and was back in to my computer, albeit a little shaken up by the back door.