If using Twilio as your
API, enter your Twilio Account SID, AUTH Token, and Outgoing Number (remove spaces and “-” dashes, just keep the + at the beginning). If you want to customise the beginning and ending of the SMS verification message, you can change the default values. Choose a verification strategy, if in doubt refer to this
section. Choose 'TwilioSMS' for the Verification
API if you want to verify using SMS messaging only, otherwise choose 'TwilioVoiceCall' for the Verification
API - which will verify accounts by placing an automated voice call.