use hyper::header::{Headers, Authorization, Basic}

        let mut headers = Headers::new();
        // if request need to be authorized
        if let Some(auth) = req.auth {
            headers.set(
               Authorization(
                   Basic {
                       username: auth.username.to_string(),
                       password: Some(auth.password.to_string())
                   }
               )
            );
        }