thats a start

src/main.rs

@@ -0,0 +1,28 @@
+use hyper::{Body, Client, Method, Request, Response};
+use hyper_tls::HttpsConnector;
+use serde::ser;
+
+fn serialize<T>(req: Response<T>) -> serde_json::Result<Response<Vec<u8>>>
+where
+    T: ser::Serialize,
+{
+    let (parts, body) = req.into_parts();
+    let body = serde_json::to_vec(&body)?;
+    Ok(Response::from_parts(parts, body))
+}
+#[tokio::main(flavor = "current_thread")]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let https = HttpsConnector::new();
+    let client = Client::builder().build::<_, hyper::Body>(https);
+
+    let request = Request::builder()
+        .method(Method::POST)
+        .uri("https://api-free.deepl.com/v2/translate")
+        .header("content-type", "application/x-www-form-urlencoded")
+        .body(Body::from(r#"{"library":"hyper"}"#))?;
+
+    let res = client.request(request).await?;
+    println!("{:?}", res.serialize());
+    assert_eq!(res.status(), 200);
+    Ok(())
+}