Charge tracker showns "unknown user" when using autocharge

[borg42]

See here: https://www.tinkerunity.org/topic/13800-warp4-erster-eindruck-und-unterst%C3%BCtzung-f%C3%BCr-evcc/#findComment-62676

[lfrancke]

This one bit me as well and I was looking for the error of my ways... what I found:

With user management enabled I believe this already works, haven't had a chance to test it yet. When it's disabled though this problem occurs.

The problem is that the ChargeStart record writes the user immediately after the charge starts. At that point the SLAC handshake has not yet identified the car, so it can't look up the user yet. By the time we know the car, the record is already on disk. To correct the persisted log we would have to go back and patch it. There is precedent for that in the code but it still feels dirty.

Displaying the correct user in the UI while charging would be relatively easy though. But I honestly don't know whether that is better or worse. Right now the running charge and the log at least agree with each other. If we fix the running charge it'd show the user but then when it's finished it'd fall back to "Unbekannter Benutzer". Also not great....

Separate problem, but related: the car itself is never recorded in the charge log at all, so that's lost after the charge in either case. That problem is described now in #329

[borg42]

If you disable the user management this is expected behavior.
You cant turn user management off, plug in your EV and then use your NFC card to get it into the charge log either.

The user management is what enables the authentication (either by NFC, or the user interface or autocharge) for the charge log.

What should or should not be shown as the currently charging user in this situation is a different question.