wrong parameter name in export

controllers/tracersearch.php

@@ -244,7 +244,7 @@ class TracersearchController extends AuthenticatedController
                 "SELECT a.`Nachname`, a.`Vorname`, a.`username`, IFNULL(c.`contact`, a.`Email`)
                 FROM `auth_user_md5` a
                     LEFT JOIN `contact_tracing_contact_data` c ON (c.`user_id` = a.`user_id`)
-                WHERE a.`username` IN (:usernames)
+                WHERE a.`username` IN (:users)
                 ORDER BY a.`Nachname`, a.`Vorname`, a.`username`",
                 ['users' => array_map('trim', preg_split('/\n|,/', Request::get('users')))]
             );

plugin.manifest

 pluginname=Kontaktverfolgung
 pluginclassname=ContactTracer
 origin=upa
-version=1.7.3
+version=1.7.4
 description=Trace contacts and personal presence via Stud.IP
 studipMinVersion=4.2
 studipMaxVersion=5.0.99