myclimate Flight Calculator V1 https://api.myclimate.org MYCLIMATE_USERNAME MYCLIMATE_PASSWORD { "from":"${request.legs[0].origin_iata}", "to":"${request.legs[last].destination_iata}", "via":"${request.vendor_options.via}", "passengers":${request.passengers}, "roundtrip":${request.roundtrip}, "flight_class":"${request.cabin_class}" }