Use insecure.NewCredentials instead of grpc.WithInsecure

grpc.WithInsecure is being deprecated.

Signed-off-by: Kazuyoshi Kato <katokazu@amazon.com>

services/server/server.go

@@ -59,6 +59,7 @@ import (
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/backoff"
 	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/credentials/insecure"
 )
 
 const (
@@ -548,7 +549,7 @@ func (pc *proxyClients) getClient(address string) (*grpc.ClientConn, error) {
 		Backoff: backoffConfig,
 	}
 	gopts := []grpc.DialOption{
-		grpc.WithInsecure(),
+		grpc.WithTransportCredentials(insecure.NewCredentials()),
 		grpc.WithConnectParams(connParams),
 		grpc.WithContextDialer(dialer.ContextDialer),