Using the "reqwest" and "serde" crates to fetch and Serialize/ Deserialize the data from typicode.com

Rust - Async Request & Response.rs

use serde::{ Serialize, Deserialize };

// Allowed the main function to be async, specifies our async code will be executed by the tokio runtime
#[tokio::main]
async fn main() -> Result<(), reqwest::Error> {
	// print!("{:#?}", add_todos().await);
	Ok(())
}

async fn add_todos() -> Result<Todo, reqwest::Error> {
	let client = reqwest::Client::new();
	let body =
		serde_json::json!({
		"userId": 1,
		"title": "Subscribe to Let's Get Rusty".to_owned(),
		"completed": false
	});

	let response: Todo = client
		.post("https://jsonplaceholder.typicode.com/todos")
		.json(&body)
		.send().await?
		.json().await?;

	return Ok(response);
}

async fn get_todos() -> Result<Vec<Todo>, reqwest::Error> {
	let client = reqwest::Client::new();
	let todos: Vec<Todo> = client
		.get("https://jsonplaceholder.typicode.com/todos?userId=1")
		.send().await?
		.json().await?;
	return Ok(todos);
}

#[derive(Debug, Serialize, Deserialize)]
struct Todo {
	#[serde(rename = "userId")]
	user_id: i32,
	id: Option<i32>,
	title: String,
	completed: bool,
}