Task: Create a client in Harvest

n8n workflow:
{"id":"120","name":"Create a client in Harvest","nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[250,300],"parameters":{},"typeVersion":1},{"name":"Harvest","type":"n8n-nodes-base.harvest","position":[450,300],"parameters":{"name":"","resource":"client","operation":"create","additionalFields":{}},"credentials":{"harvestApi":""},"typeVersion":1}],"active":false,"settings":{},"connections":{"On clicking 'execute'":{"main":[[{"node":"Harvest","type":"main","index":0}]]}}}