(DOCSP-7888): x509 go snippet (#578)

* (DOCSP-7887): added csharp x509 code

* (DOCSP-7888): added x509 code for go

* (DOCSP-7888): removed accidental push of csharp file

* (DOCSP-7888): go snippet syntax improvements

* (DOCSP-7888): added bson.D to countDocs

* (DOCSP-7888): updated uri

Author: Mohammad Hunan Chughtai

source/includes/connection-snippets/x509-snippets/go-connection.go

@@ -0,0 +1,29 @@
+// begin x509 connection
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+	"go.mongodb.org/mongo-driver/bson"
+)
+
+func main() {
+	ctx := context.TODO()
+	certificateKeyFilePath := "/etc/certs/mongodb/client.pem"
+	uri := "mongodb+srv://<cluster-url>/test?authSource=$external&tlsCertificateKeyFile=%s&retryWrites=true&w=majority&authMechanism=MONGODB-X509"
+	uri = fmt.Sprintf(uri, certificateKeyFilePath)
+	clientOpts := options.Client().ApplyURI(uri)
+
+	client, err := mongo.Connect(ctx, clientOpts)
+	if err != nil { log.Fatal(err) }
+	defer client.Disconnect(ctx)
+
+	collection := client.Database("testDB").Collection("testCol")
+	docCount, err := collection.CountDocuments(ctx, bson.D{})
+	if err != nil { log.Fatal(err) }
+	fmt.Println(docCount)
+}
+// end x509 connection