Sending SMS notifications in Laravel is powered by Vonage (formerly known as Nexmo). The package includes a configuration file. However, you are not required to export this configuration file to your own application. You can simply use the VONAGE_KEY and VONAGE_SECRET environment variables to define your Vonage public and secret keys. After defining your keys, you should set a VONAGE_SMS_FROM environment variable that defines the phone number that your SMS messages should be sent from by...