Make the workflow configurable but with default, remove comments in example

Author: lornajane

config.sh

@@ -68,6 +68,7 @@ REPORT=${REPORT_URL:-""}
 # Verify
 REQUEST_ID=${REQUEST_ID:-""}
 CODE=${CODE:=""}
+WORKFLOW_ID=${WORKFLOW_ID:-"1"}
 
 # Vonage Business Cloud
 VBC_CLIENT_ID=${VBC_CLIENT_ID:-""}

verify/send-verification-code-with-workflow.sh

@@ -1,5 +1,4 @@
 #!/usr/bin/env bash
 source "../config.sh"
 
-# Try workflow_id 4 for SMS followed by SMS
-curl -X GET "https://api.nexmo.com/verify/json?&api_key=$NEXMO_API_KEY&api_secret=$NEXMO_API_SECRET&number=$RECIPIENT_NUMBER&brand=AcmeInc&workflow_id=4"
+curl -X GET "https://api.nexmo.com/verify/json?&api_key=$NEXMO_API_KEY&api_secret=$NEXMO_API_SECRET&number=$RECIPIENT_NUMBER&brand=AcmeInc&workflow_id=$WORKFLOW_ID"