# ./netclient join -m 01:02:03:04:05:06 -t eyJncnBj ... OiIifQ==
2022/03/07 15:43:10 [netclient] joining mg586ZJ4 at grpc.nm.AAA-BBB-CCC-DDD.nip.io:443
2022/03/07 15:43:11 rpc error: code = Unknown desc = Key: 'Node.MacAddress' Error:Field validation for 'MacAddress' failed on the 'macaddress_