Optional providerProvider backend: 'twilio' or 'cloud-api'. Defaults to 'twilio'.
Optional accountTwilio Account SID.
Optional authTwilio Auth Token. If provided, overrides credential.
Optional phoneTwilio WhatsApp-enabled phone number (e.g., 'whatsapp:+14155238886').
Optional businessWhatsApp Business API access token. If provided, overrides credential.
Optional phonePhone Number ID from the WhatsApp Business Platform.
Optional apiGraph API version (default: 'v21.0').
Optional verifyVerify token for webhook validation.
Platform-specific parameters for WhatsApp connections.