Task: Sending an SMS using sms77

n8n workflow:
{"id":"92","name":"Sending an SMS using sms77","nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[250,300],"parameters":{},"typeVersion":1},{"name":"Sms77","type":"n8n-nodes-base.sms77","position":[450,300],"parameters":{"message":"Hello from n8n!"},"credentials":{"sms77Api":""},"typeVersion":1}],"active":false,"settings":{},"connections":{"On clicking 'execute'":{"main":[[{"node":"Sms77","type":"main","index":0}]]}}}