Function poll_oauth_device_code_flow 

pub async fn poll_oauth_device_code_flow<T, F, Fut>(
    interval_seconds: Option<u64>,
    expires_in_seconds: Option<u64>,
    cancellation_token: Option<CancellationToken>,
    poll: F,
) -> Result<T>
where
    F: FnMut() -> Fut,
    Fut: Future<Output = Result<OAuthDeviceCodePollResult<T>>>,