Timeular Public API sign_in 2

main.rs

#[derive(Serialize, Debug)]
#[serde(rename_all = "camelCase")]
struct SignInRequest {
    api_key: String,
    api_secret: String,
}

#[derive(Deserialize, Debug)]
struct SignInResponse {
    token: String,
}

async fn sign_in(api_key: String, api_secret: String) -> Result<String, Error> {
    let body = SignInRequest {
            api_key,
            api_secret,
    };
    let resp = CLIENT
            .post(&url("/developer/sign-in"))
            .json(&body)
            .send()
            .await?
            .json::<SignInResponse>()
            .await?;
    Ok(resp.token)
}