/**
* Use MailChimp API key to try to grab corresponding user profile to check validity of key
*
* @param string
* @return bool
*/
function li_check_invalid_api_key($api_key)
{
$gr = new LI_GetResponse($api_key);
$ping = $gr->ping();
if (!empty($ping)) {
$invalid_key = FALSE;
} else {
$invalid_key = TRUE;
}
return $invalid_key;
}
