Ability to track events in Mixpanel

[tedpower]

This may be a noob question —

I'd like to track our logged-in users in Mixpanel (for things like cohort analysis). The NextAuth Events seem like the perfect way to do this. But for some reason, I can't seem to get it to work.

I track plenty of client-side Mixpanel events currently; those work fine. I added the following code to [...nextauth].tsx —

import mixpanel from "mixpanel-browser";
...
 events: {
    async signIn(message) {
      mixpanel.init(process.env.MIXPANEL_TOKEN, { debug: true });
      mixpanel.track("Sign In");
      console.log("sign in");
      console.log(message);
    }
}

Those console.log calls work great / as expected — in my terminal locally I see the "sign in" log and then the full message print-out. But that mixpanel track event doesn't make it to Mixpanel.

I have no idea why. Any ideas? Honestly, I am neither a NextAuth nor Mixpanel expert, so I might be doing something dumb.

Any pointers would be appreciated!

[tedpower]

OK nevermind, figured it out, need to use the Node package — https://developer.mixpanel.com/docs/nodejs — confusing because it's all in React / Next.js, but needed the server side library.