refactor(AuthController): replace hardcoded API URL with environment variable env('GAME_SERVER_API_URL')

app/Http/Controllers/Auth/AuthController.php

@@ -60,7 +60,7 @@ class AuthController extends Controller
 			'verify' => false
 		]);
 		
-		return $client->request('get', 'http://192.168.1.73:8000/api/login', ['query' => $request->all()])->getBody()->getContents();
+		return $client->request('get', env('GAME_SERVER_API_URL') . '/api/login', ['query' => $request->all()])->getBody()->getContents();
 
         $xml = 'null';