To get your token:
- go to https://info-car.pl
- register/login
- go to https://info-car.pl/new/prawo-jazdy/sprawdz-wolny-termin
- select "Egzamin na prawo jazdy (PKK)"
- select any województwo/ośrodek/kategoria
- open "Network Monitor" in your web-browser (ctrl+shift+e in Firefox)
- press "Dalej"
- PUT request to file `exam-schedule` has "Authorization" header, copy content to this file

Example file content:
Bearer YOUR_VERY_LONG_TOKEN