Currently the aklog is called from within "systemd -user" as a user
unit.

This is too late as systemd --user needs to access
$HOME/.config/systemd.conf for instance at start up.

Instead run aklog as a forced dependent unit for user@<uid>.service.

This is the same mechanism as for instance "user-runtime-dir@.service"
uses to create $XDG_RUNTIME_DIR.