the provider can be sigleton but the client needs to be updated

Author: eaperezc

src/Providers/Traits/Singleton.php

@@ -25,6 +25,10 @@ public static function getInstance(Client $client)
 		if (!static::$instance) {
             static::$instance = new static($client);
         }
+
+        // since we can call this for multiple clients we
+        // make sure this client is updated with the latest one
+        static::$instance->setClient($client);
         return static::$instance;
 	}