Because when you register, that registration document is public record. And it has what you declared. If you want to vote, you HAVE to do this step. No choice in that matter.
I walked in our election central and they gave it to me.
if IDType is DLN, then IDENTIFICATION_NUMBER is your drivers license.
if IDTYPE is DOBSS, then its the month/day/year/last4 SSN
Frankly, this should not be public record. This would be a breach notification if it was a company doing it. But I walked in to election central, and they PLUGGED in my usb stick into their computers. I could have been a bad actor and had powershell or ironpython exploits - but i'm not that person.
I walked in our election central and they gave it to me.