Trying to get property of non-object

[tobeorla]

PushApi::log() is static and it requires SLIM container from self::$container to run:
https://github.com/watzenare/PushApi/blob/master/PushApi/PushApi.php#L190

The problem is, that self::$container is filled by __construct which means that it won't be set when you fire PushApi::log()
https://github.com/watzenare/PushApi/blob/master/PushApi/PushApi.php#L51

I made this hack to make it work, but it's just that, a hack:

if ($app == null) {
    echo $level . " - " . $message . "\n";
    return;
}