first upload all files

Modules/Newsletter/Providers/NewsletterServiceProvider.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Modules\Newsletter\Providers;
+
+use Illuminate\Support\ServiceProvider;
+
+class NewsletterServiceProvider extends ServiceProvider
+{
+    /**
+     * Bootstrap the application services.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        if (config('app.installed')) {
+            $this->app['config']->set('newsletter.apiKey', setting('mailchimp_api_key'));
+            $this->app['config']->set('newsletter.lists.subscribers.id', setting('mailchimp_list_id'));
+        }
+    }
+}