This program will list all the databases present on the MongoDB server

listDBs.go

package main 
import ( 
	"context" 
	"fmt" 
	"go.mongodb.org/mongo-driver/bson" 
	"go.mongodb.org/mongo-driver/mongo" 
	"go.mongodb.org/mongo-driver/mongo/options" 
) 
func main() { 
	ctx := context.TODO() 
	opts := options.Client().ApplyURI("mongodb://localhost:27017")

	client, err := mongo.Connect(ctx, opts) 
	if err != nil { 
		panic(err) 
	} 
	defer client.Disconnect(ctx)

	fmt.Printf("%T\n", client) 

	dbNames, err := client.ListDatabaseNames(ctx, bson.M{}) 
	if err != nil { 
		panic(err) 
	} 
	fmt.Println(dbNames) 
}