Add enabled config

Author: ajcastro

config/twilio-notification-channel.php

@@ -1,6 +1,7 @@
 <?php
 
 return [
+    'enabled' => env('TWILIO_ENABLED', true),
     'username' => env('TWILIO_USERNAME'), // optional when using auth token
     'password' => env('TWILIO_PASSWORD'), // optional when using auth token
     'auth_token' => env('TWILIO_AUTH_TOKEN'), // optional when using username and password

src/TwilioChannel.php

@@ -43,6 +43,10 @@ public function __construct(Twilio $twilio, Dispatcher $events)
      */
     public function send($notifiable, Notification $notification)
     {
+        if (! $this->twilio->config->enabled()) {
+            return;
+        }
+
         try {
             $to = $this->getTo($notifiable, $notification);
             $message = $notification->toTwilio($notifiable);

src/TwilioConfig.php

@@ -15,6 +15,11 @@ public function __construct(array $config)
         $this->config = $config;
     }
 
+    public function enabled()
+    {
+        return $this->config['enabled'];
+    }
+
     public function usingUsernamePasswordAuth(): bool
     {
         return $this->getUsername() !== null && $this->getPassword() !== null && $this->getAccountSid() !== null;