It is not working! 
I have grant myself the permissions, have activated it using /autokick on, then used /autokick kick to kick all the players. I also enabled the autokick in the config file. 
But still not workign! They get kicked but they still can join again!

noticed this as well
Autokick does nothing to stop people joining

Change code in CS file to

private object CanUserLogin(string name, string id, string ip)
{
    if (config.akEnable)
    {
        if (!config.akWhitelist.Contains(name, StringComparer.OrdinalIgnoreCase) &&
            !config.akWhitelist.Contains(ip) && !config.akWhitelist.Contains(id))
        {
            return config.akKickMessage;
        }
    }
    
    return null;
}

Merged post

@Wulf can you update it?

where does this go @Orange , @Wulf

Hi sorry to bother you but Autokick doesn't seem to be working, I've tried changing the settings in the config file, granting myself permissions, clearing the whitelist, reloading the plugin and reinstalling the plugin all multiple times. All the chat commands work but the kick command says it is kicking everyone who isnt an admin or on the whitelist like it should but it doesn't actually kick anyone. Thanks

set it up enabled true and on via chat no one is getting kicked lol

Please verify that it is enabled in the configuration and reload the plugin. May need to apply the patch mentioned above.