feat: support nats nkey seed auth (#21231)

internal/event/target/nats_contrib_test.go

@@ -19,6 +19,8 @@ package target
 import (
 	"testing"
 
+	"github.com/nats-io/nats-server/v2/server"
+
 	xnet "github.com/minio/pkg/v3/net"
 	natsserver "github.com/nats-io/nats-server/v2/test"
 )
@@ -96,3 +98,34 @@ func TestNatsConnToken(t *testing.T) {
 	}
 	defer con.Close()
 }
+
+func TestNatsConnNKeySeed(t *testing.T) {
+	opts := natsserver.DefaultTestOptions
+	opts.Port = 14223
+	opts.Nkeys = []*server.NkeyUser{
+		{
+			// Not a real NKey
+			// Taken from https://docs.nats.io/running-a-nats-service/configuration/securing_nats/auth_intro/nkey_auth
+			Nkey: "UDXU4RCSJNZOIQHZNWXHXORDPRTGNJAHAHFRGZNEEJCPQTT2M7NLCNF4",
+		},
+	}
+	s := natsserver.RunServer(&opts)
+	defer s.Shutdown()
+
+	clientConfig := &NATSArgs{
+		Enable: true,
+		Address: xnet.Host{
+			Name:      "localhost",
+			Port:      (xnet.Port(opts.Port)),
+			IsPortSet: true,
+		},
+		Subject:  "test",
+		NKeySeed: "testdata/contrib/test.nkey",
+	}
+
+	con, err := clientConfig.connectNats()
+	if err != nil {
+		t.Errorf("Could not connect to nats: %v", err)
+	}
+	defer con.Close()
+}