Task: Send an SMS/Whatsapp message with Twilio

n8n workflow JSON:
{"name":"A workflow with the Twilio node","nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[250,300],"parameters":{},"typeVersion":1},{"name":"Twilio","type":"n8n-nodes-base.twilio","position":[430,300],"parameters":{},"credentials":{"twilioApi":""},"typeVersion":1}],"active":false,"settings":{},"connections":{"On clicking 'execute'":{"main":[[{"node":"Twilio","type":"main","index":0}]]}}}