The default person_fn does not work for me. I use Symfony 6.2, version 4 of this repo.
Over my PR.
But i am not sure if i am doing anything wrong, or at which point is does not work.

https://docs.rollbar.com/docs/person-tracking
https://docs.rollbar.com/docs/symfony#person_fn-configuration-option

The field: body.extra.token.user_identifier is set correcty in the Item-Report in Rollbar.
But Rollbar does not seems to understand, that this is the user.

@danielmorell Maybe you can have a look?