We Have Gateway Model RAK7268V2, We Tried to Configure a gateway from Base Station to Packet Forwarder Mode Through LCTT Server , But If Fails And Give a error of SSH Connection Also Mention the Private -SSH Key Error , Please guide us how to configure a gateway for LCTT Certifications on US915 Band, Also give Configuration Json file for the same and steps to Write the Same For Class C LoRa Devices.