Twilio Credentials
From Twilio Console.
If both API Key fields are set, they take precedence over Auth Token.
Connection status
Not tested yet
How this works
  1. Save your Account SID + Auth Token — encrypted in twilio_settings.
  2. Click Test Connection — hits /Accounts/{SID}.json.
  3. Then go to Phone Numbers → click Sync from Twilio to import your owned numbers.