Depends on the country though. In France you must be registered to vote (you’re assigned a specific voting office). It’s a single registration foe everything, not for each vote
Although the process is online, and takes like 5mins.
You also get a voting card, but it’s technically optional, it just speeds up the process in the voting office.
Just a heads-up, until v2 is released, it does not scale. I used it to monitor around 40 services. It’s too much. So if you have a lot of things to monitor for uptime you might need to either split in several uptime-kuma services, or reduce the frequency