How can I know how many visitors are using light or dark theme via custom events?

[legendofmi]

I’m currently using the Cloud Umami and I set up a custom page view event in which I added the theme the users are using (dark or light). Something like this:
umami.track(props => ({...props, data: { theme: theme()}})) }

Where theme() is a JS function that returns "dark-default", "light-default", "dark" or "light".

It seems if I click on the property “theme” I get a graph for the events. Is there a way to get the graph per visitor instead of per event?

Edit: it seems umami.identify instead of track did the trick