Task: Get all Excel workbooks

n8n workflow JSON:
{"nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[250,300],"parameters":{},"typeVersion":1},{"name":"Microsoft Excel","type":"n8n-nodes-base.microsoftExcel","position":[450,300],"parameters":{"filters":{},"operation":"getAll"},"credentials":{"microsoftExcelOAuth2Api":"ms-oauth-creds"},"typeVersion":1}],"connections":{"On clicking 'execute'":{"main":[[{"node":"Microsoft Excel","type":"main","index":0}]]}}}