Fix getUsernameByEmail()

Author: communiteq

lib/DiscourseAPI.php

@@ -206,7 +206,9 @@ function activateUser($userId)
 
     function getUsernameByEmail($email)
     {
-        $users = $this->_getRequest("/admin/users/list/active.json?filter=".urlencode($email));
+        $users = $this->_getRequest('/admin/users/list/active.json', 
+            [ 'filter' => $email, 'show_emails' => 'true' ] 
+        );
         foreach($users->apiresult as $user) {
             if($user->email === $email) {
                 return $user->username;