Add missing Friendica\DI namespace to files (PHPStorm inspection)

src/Network/FKOAuthDataStore.php

@@ -12,6 +12,7 @@ namespace Friendica\Network;
 use Friendica\Core\Config;
 use Friendica\Core\Logger;
 use Friendica\Database\DBA;
+use Friendica\DI;
 use Friendica\Util\Strings;
 use OAuthConsumer;
 use OAuthDataStore;