Trying to Restore Backup, it asks for password I never used

Where do I find this password? Is there a way to reset it using my apple ID?

I know all my apple passwords it should not be that hard right?

I see a lot of people asking this question and everyone just recommends 40$

3rd party software to hack the passcode. I do not want to pay money for

Apple's software engineer's mistake. This is really inconvenient I

have extremely important data on this backup.