Fix for providing default AppKey
Fix for providing default AppKey

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