perform connection callbacks

config/expose.php

@@ -299,6 +299,17 @@ return [
         */
         'subdomain_generator' => \App\Server\SubdomainGenerator\RandomSubdomainGenerator::class,
 
+        /*
+        |--------------------------------------------------------------------------
+        | Connection Callback
+        |--------------------------------------------------------------------------
+        |
+        | This is a callback method that will be called when a new connection is
+        | established.
+        |
+        */
+        'connection_callback' => null,
+
         /*
         |--------------------------------------------------------------------------
         | Users