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: uploader.rs
    path of file: ./repos/aws-sdk-rust/examples/cross_service/photo_asset_management/src
    
    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
use aws_sdk_dynamodb::primitives::DateTime;
use aws_sdk_s3::primitives::ByteStream;
use aws_smithy_types_convert::date_time::DateTimeExt;
use std::io::prelude::*;
use std::io::Write;
use tempfile::tempfile;
use zip_next::{write::FileOptions, ZipWriter};

use crate::common::Common;

pub struct ZipUpload<'a> {
    s
    
    pub async fn finish(mut self) -> Result<(String, String), anyhow::Error> {
        let mut zip = self.zip.finish()?;
        // Because this file is read immediately, seek it back to the start.
        zip.seek(std::io::SeekFrom::Start(0))?;

        let bucket = self.bucket;
        let key = self.key;

        let body = ByteStream::read_from()
            .file(zip.try_into()?)
            .buffer_size(4096 * 16)
            .build()
            .await?;

        self.s3_client
            .put_object()
            .bucket(bucket.clone())
            .key(format!("{}.zip", key))
            .body(body)
            .send()
            .await?;

        Ok((bucket, key))
    }