public function deleteEmailAccount($user, $params) {
		if (is_null($user) || ! is_string($user) || (! strpos($user, '@') === false)) {
			throw new InvalidArgumentException('user must be string representing userId');
		}
		if (is_string($params)) {
			$params = array('label' => $params);
		}
		else {
			$params = $this->_filterParams($params, array('label'), array('label'));
			if ($params === false) {
				throw new InvalidArgumentException("params array contains invalid parameters or misses required parameters");
			}
		}
		return $this->delete($user, 'email_accounts/' . $params['label']);
	}