Configures the Twilio account used to send outbound SMS messages for authentication and notifications.

###### Getting Your Twilio Credentials

1. Log in to the Twilio Console.
2. From the Account Info panel on the dashboard, copy your Account SID and Auth Token.
3. To use a Messaging Service (recommended for production), navigate to Messaging → Services, create or select a service, and copy the Messaging Service SID.
4. Alternatively, purchase a Twilio phone number and enter it in the Sender ID or Phone Numbers fields.

###### Settings

Enabled
  Activates Twilio as the outbound SMS provider.
Account SID
  Your Twilio Account SID (starts with `AC`). Stored encrypted at rest.
Auth Token
  Your Twilio Auth Token. Stored encrypted at rest.
Messaging Service SID
  Optional. The SID of a Twilio Messaging Service (starts with `MG`). Using a Messaging Service enables features like number pools and sticky sender. Stored encrypted at rest.
Sender ID
  Optional. An alphanumeric sender ID (e.g. your brand name, up to 11 characters) or a Twilio phone number in E.164 format (e.g. `+14155552671`) used when a Messaging Service SID is not configured.
Phone Numbers
  Optional. A list of Twilio phone numbers in E.164 format available for sending.

Open Twilio Console