use_middleware doesn't work - how to start tracker?

I don't want to generally enable the tracker but need activate it by middleware or command.

The "use_middleware" seems not to be implemented.

How to start it?
use Tracker;
Tracker::currentSession();

Doesn't work!!

It only works with 'enabled' => true, in the config for each request.

Start by tracing the use_middleware configuration and the middleware entry point, then compare that path with the enabled => true configuration described in the issue. Done means Tracker::currentSession() works for a request when activation is performed through middleware or a command without globally enabling the tracker.

Written by the indexing model from the issue text.