API provider — lufthansa.com:public
curl \
-H "Authorization: Bearer $ACCESS_TOKEN" \
https://api.lufthansa.com/v1/offers/lounges/{location}curl \
-H "Authorization: Bearer $ACCESS_TOKEN" \
https://api.lufthansa.com/v1/references/cities/{cityCode}curl \
-H "Authorization: Bearer $ACCESS_TOKEN" \
https://api.lufthansa.com/v1/references/airlines/{airlineCode}