Expire a Specific API Key. Note that if you expire all of your keys, just visit <a href="http://admin.mailchimp.com/account/api" target="_blank">your API dashboard</a> to create a new one. If you are trying to shut off access to your account for an old developer, change your MailChimp password, then expire all of the keys they had access to. Note that this takes effect immediately, so make sure you replace the keys in any working application before expiring them! Consider yourself warned...
Signature
public function apikeyExpire(string
$username,
string
$password )