fix: less cache

src/Client.php

@@ -41,7 +41,6 @@ class Client implements HttpClientInterface, HasSourceModelInterface
 
     private ConfigInterface $config;
     private CacheInterface $cache;
-    private int $ttlMarginInSeconds = 60;
 
     public function __construct(ConfigInterface $config, ClientInterface $httpClient, CacheInterface $cache)
     {
@@ -82,7 +81,7 @@ public function getAuthToken(): string
         $this->cache->set(
             $this->authTokenCacheKey(),
             $response->token,
-            $expiresAt->subSeconds($this->ttlMarginInSeconds)->diffInSeconds(Carbon::now())
+            $expiresAt->diffInSeconds(Carbon::now()) / 2
         );
 
         return $response->token;

tests/GetAuthTokenTest.php

@@ -65,7 +65,7 @@ public function it_can_cache_and_return_auth_token()
             ->with(
                 $api->authTokenCacheKey(),
                 $this->tokenValue,
-                3600 - 60
+                1800
             );
     }