package main

import (
"context"
"fmt"
"github.com/apex/log"
"github.com/mongodb/mongo-go-driver/bson"
"github.com/mongodb/mongo-go-driver/mongo"
"github.com/mongodb/mongo-go-driver/mongo/clientopt"
"time"
)

func main()

{ f1() }

func f1() {
appname := clientopt.AppName("myapp")
conTimeout := clientopt.ConnectTimeout(time.Second)
sockTimout := clientopt.SocketTimeout(time.Second)
serverSTimeout := clientopt.ServerSelectionTimeout(time.Second * 3)
single := clientopt.Single(true)
auth := clientopt.Auth(clientopt.Credential

{AuthMechanism: "SCRAM-SHA-1", AuthSource: "xxx", Username: "xxx", Password: "as@xxx"}

)

client, err := mongo.NewClientWithOptions("mongodb://localhost:27017", single, serverSTimeout, appname, sockTimout, conTimeout, auth)
if err != nil

{ log.WithError(err).Fatal("error connecting") }
err = client.Connect(context.Background())
if err != nil { log.WithError(err).Fatal("error connecting") }

fmt.Println(client.ListDatabases(context.Background(), nil))

collection := client.Database("xxx").Collection("test")

cur, err := collection.Find(context.Background(), nil)
if err != nil

{ log.WithError(err).Fatal("failed to find collection") }

defer cur.Close(context.Background())
for cur.Next(context.Background()) {
elem := bson.NewDocument()
err := cur.Decode(elem)
if err != nil

{ log.WithError(err).Fatal("failed to decode element") }

// do something with elem....
fmt.Printf("%v\n", elem.ToExtJSON(true))
}
if err := cur.Err(); err != nil

{ log.WithError(err).Fatal("failed to get cursor") }

}

than go run main.go, it outputs

command-line-arguments

{[] 0}

auth error: sasl conversation error: unable to authenticate using mechanism "SCRAM-SHA-1": Authentication failed.
2018/07/20 17:48:35 fatal failed to find collection error=auth error: sasl conversation error: unable to authenticate using mechanism "SCRAM-SHA-1": Authentication failed.
exit status 1

how to make it works