diff --git a/src/Guard.php b/src/Guard.php
index ab7274f3..f360060d 100644
--- a/src/Guard.php
+++ b/src/Guard.php
@@ -113,12 +113,12 @@ protected function hasValidProvider($tokenable)
      */
     protected function isValidAccessToken($accessToken): bool
     {
-        if (!$accessToken) {
+        if (! $accessToken) {
             return false;
         }
 
         $is_valid =
-            (!$this->expiration || $accessToken->created_at->gt(now()->subMinutes($this->expiration)))
+            (! $this->expiration || $accessToken->created_at->gt(now()->subMinutes($this->expiration)))
             && $this->hasValidProvider($accessToken->tokenable);
 
         if (is_callable(Sanctum::$validateCallback)) {