`node.testnet.concordium.com` is the old testnet node which will be deprecated soon, replace with `grpc.testnet.concordium.com` Also add the `--secure` flag as well since the new endpoint uses TLS
node.testnet.concordium.comis the old testnet node which will be deprecated soon, replace withgrpc.testnet.concordium.comAlso add the
--secureflag as well since the new endpoint uses TLS