Notify admin of new user registration

app/Mail/Admin/UserRegistered.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Mail\Admin;
+
+use Illuminate\Bus\Queueable;
+use Illuminate\Mail\Mailable;
+use Illuminate\Queue\SerializesModels;
+
+use App\Models\User;
+
+class UserRegistered extends Mailable
+{
+    use Queueable, SerializesModels;
+
+    public $subject, $user;
+
+    public function __construct(User $user, $subject=null)
+    {
+        $this->subject = $subject ?: 'A new user registered';
+        $this->user = $user;
+    }
+
+    public function build()
+    {
+        return $this->markdown('emails.admin.registered')
+                    ->subject($this->subject)
+                    ->with(['user' => $this->user]);
+    }
+}