Rust - json method not found in `Result<reqwest::blocking::Response, reqwest::Error>`

Question

I want to use reqwest but i can't i have an error :

let users: Vec<User> = response.json();
                                ^^^^ method not found in `Result<reqwest::blocking::Response, reqwest::Error>

this is my code :

use reqwest::Error;
use tokio;

#[derive(Deserialize, Debug)]
struct User {
    origin: String
}


#[tokio::main]
pub fn main() {

    let request_url = format!("https://api.ipify.org");
    println!("{}", request_url);
    let response = reqwest::blocking::get(&request_url);

    let users: Vec<User> = response.json();
    println!("{:?}", users);
}

my dependencies :

[dependencies]
serde = { version = "1.0.136", features = ["derive"]}
reqwest = { version = "0.11.9", features = ["blocking", "json"]}
tokio = { version = "1.17.0", features = ["full"] }

why would this happen? what should I do to fix this problem?