Base path /routing/ on https://gw.taxiaddis.com.
Authenticate with the X-API-Key header.
Params: coordinates (lng,lat;lng,lat), overview, steps.
curl -H "X-API-Key: tak_live_xxx" \
"https://gw.taxiaddis.com/routing/route/v1/driving/38.75,9.01;38.80,9.03?overview=false"