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: main.rs
    path of file: ./repos/async-openai/examples/audio-speech/src
    
    the code of the file until where you have to start completion: use async_openai::{
    types::{CreateSpeechRequestArgs, SpeechModel, Voice},
    Client,
};
use std::error::Error;

#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
    let client = Client::new();

    let request = CreateSpeechRequestArgs::default()
        .input("Today is a wonderful day to build something people love!")
        .
    
async fn main() -> Result<(), Box<dyn Error>> {
    let client = Client::new();

    let request = CreateSpeechRequestArgs::default()
        .input("Today is a wonderful day to build something people love!")
        .voice(Voice::Alloy)
        .model(SpeechModel::Tts1)
        .build()?;

    let response = client.audio().speech(request).await?;

    response.save("./data/audio.mp3").await?;

    Ok(())
}