From 0742d5150cabc760a052473843d773e9fc472051 Mon Sep 17 00:00:00 2001
From: filecage <mail@dbeuchert.com>
Date: Wed, 13 Mar 2019 10:08:57 +0100
Subject: [PATCH] explicit is better than implicit :)

---
 src/Grant/AbstractGrant.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Grant/AbstractGrant.php b/src/Grant/AbstractGrant.php
index 90c75d51..45269ac7 100644
--- a/src/Grant/AbstractGrant.php
+++ b/src/Grant/AbstractGrant.php
@@ -478,7 +478,7 @@ abstract class AbstractGrant implements GrantTypeInterface
     {
         $refreshToken = $this->refreshTokenRepository->getNewRefreshToken();
         if ($refreshToken === null) {
-            return;
+            return null;
         }
 
         $refreshToken->setExpiryDateTime((new DateTime())->add($this->refreshTokenTTL));