[fix/ttnctl] Use of right argument index in ttnctl
[fix/ttnctl] Use of right argument index in ttnctl

mgranberry/ttn,LoRaWanSoFa/ttn,TheThingsNetwork/ttn,TheThingsNetwork/ttn,jvanmalder/ttn,jvanmalder/ttn,mgranberry/ttn,mgranberry/ttn,jvanmalder/ttn,TheThingsNetwork/ttn,LoRaWanSoFa/ttn