You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: UploadObject.go
    path of file: ./repos/aws-doc-sdk-examples/go/s3/UploadObject
    
    the code of the file until where you have to start completion: // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

// snippet-start:[s3.go.upload_object]
package main

// snippet-start:[s3.go.upload_object.imports]
import (
	"flag"
	"fmt"
	"os"

	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/s3/s3manage
    
func main() {
	// snippet-start:[s3.go.upload_object.args]
	bucket := flag.String("b", "", "The bucket to upload the file to")
	filename := flag.String("f", "", "The file to upload")
	flag.Parse()

	if *bucket == "" || *filename == "" {
		fmt.Println("You must supply a bucket name (-b BUCKET) and file name (-f FILE)")
		return
	}
	// snippet-end:[s3.go.upload_object.args]

	// snippet-start:[s3.go.upload_object.session]
	sess := session.Must(session.NewSessionWithOptions(session.Options{
		SharedConfigState: session.SharedConfigEnable,
	}))
	// snippet-end:[s3.go.upload_object.session]

	err := PutFile(sess, bucket, filename)
	if err != nil {
		fmt.Println("Got error uploading file:")
		fmt.Println(err)
		return
	}
}