public function send($media_id, $recipients, $time = 3) {
		// Make sure we're logged in and have a valid access token.
		if (!$this->auth_token || !$this->username) {
			return FALSE;
		}

		$timestamp = parent::timestamp();
		$result = parent::post(
			'/send',
			array(
				'media_id' => $media_id,
				'recipient' => implode(',', $recipients),
				'time' => $time,
				'timestamp' => $timestamp,
				'username' => $this->username,
			),
			array(
				$this->auth_token,
				$timestamp,
			)
		);

		return is_null($result);
	}