Fix: Wrong client id and client secret will leads to fatal error.

Author: rgodiyal

src/Utils/HttpClient.php

@@ -33,7 +33,7 @@ public function setMethod(string $method): self
         return $this;
     }
 
-    public function fetch(): object
+    public function fetch(): ?object
     {
         try {
             $curl = curl_init();
@@ -58,4 +58,4 @@ public function fetch(): object
             throw new \Exception("Curl request Failed. Reason: ". $e->getMessage());
         }
     }
-}
+}