example of re-creating a client when an initial request gets a 401 response

retry.rs

extern crate reqwest;
use reqwest::*;

#[derive(Debug)]
struct MyClient {
  client: Client,
  token: String
}

impl MyClient {
  fn new() -> MyClient {
    MyClient {
      client: Client::new(),
      token: "".to_string()
    }
  }

  pub fn get(&mut self, url: &str) -> Result<Response> {
    let url_clone = url.clone();
    let u = Url::parse(&url_clone).unwrap();

    let init_res = self.client.get(u).send().unwrap();
    if init_res.status() == StatusCode::UNAUTHORIZED {
      println!("generating new client");
      self.client = Client::new();
      let u = Url::parse(&url_clone).unwrap();
      return Ok(self.client.get(u).send()?)
    }
    Ok(init_res)
  }
}

fn main() {
  let mut my_client = MyClient::new();
  let url = "https://httpstat.us/401";
  let res = my_client.get(url).unwrap();
  println!("{:#?}", res);
}