Add E-Signatures to Rust (Axum)

use axum::{Json, extract::State};
use reqwest::Client;
use serde::{Deserialize, Serialize};

#[derive(Deserialize, Serialize)]
struct ContractReq {
    content: String,
    sender_name: String,
    sender_email: String,
    recipient_name: String,
    recipient_email: String,
}

async fn send_contract(
    State(client): State<Client>,
    Json(req): Json<ContractReq>,
) -> Json<serde_json::Value> {
    let res = client.post("https://signb.ee/api/send")
        .bearer_auth(std::env::var("SIGNBEE_API_KEY").unwrap())
        .json(&req)
        .send().await.unwrap();
    Json(res.json().await.unwrap())
}