Task: Backup workflows to GitHub

n8n workflow JSON:
{"nodes":[{"name":"GitHub Edit","type":"n8n-nodes-base.github","position":[1190,610],"parameters":{"owner":"YOUR_USERNAME","filePath":"={{$json[\"data\"][\"name\"]}}.json","resource":"file","operation":"edit","repository":"REPO_NAME","fileContent":"={{JSON.stringify($json[\"data\"])}}","commitMessage":"=[N8N Backup] {{$json.data[\"name\"]}} ({{new Date(Date.now()).toLocaleDateString()}})"},"credentials":{"githubApi":"GitHub@harshil1712"},"typeVersion":1},{"name":"Get Files","type":"n8n-nodes-base.github","position":[200,500],"parameters":{"owner":"YOUR_USERNAME","filePath":"/","resource":"file","operation":"get","repository":"REPO","asBinaryProperty":false},"credentials":{"githubApi":"GitHub@harshil1712"},"executeOnce":true,"typeVersion":1,"alwaysOutputData":false},{"name":"Transform","type":"n8n-nodes-base.function","position":[400,500],"parameters":{"functionCode":"return items[0].json.map(item => {\n  return {\n    json: item\n  }\n});\n"},"typeVersion":1},{"name":"Create file","type":"n8n-nodes-base.github","position":[1240,280],"parameters":{"owner":"YOUR_USERNAME","filePath":"={{$json[\"data\"][\"name\"]}}.json","resource":"file","repository":"REPO","fileContent":"={{JSON.stringify($node['Merge'].json[\"data\"])}}","commitMessage":"=[N8N Backup] {{$json.data[\"name\"]}}.json ({{new Date(Date.now()).toLocaleDateString()}})"},"credentials":{"githubApi":"GitHub@harshil1712"},"typeVersion":1},{"name":"Merge","type":"n8n-nodes-base.merge","position":[930,280],"parameters":{"mode":"removeKeyMatches","propertyName1":"data.name","propertyName2":"data.name"},"typeVersion":1},{"name":"Get workflows","type":"n8n-nodes-base.httpRequest","position":[200,300],"parameters":{"url":"http://localhost:5678/rest/workflows","options":{},"authentication":"basicAuth"},"credentials":{"httpBasicAuth":"n8n instance auth"},"typeVersion":1},{"name":"Get workflow data","type":"n8n-nodes-base.httpRequest","position":[600,300],"parameters":{"url":"=http://localhost:5678/rest/workflows/{{$json[\"id\"]}}","options":{},"authentication":"basicAuth"},"credentials":{"httpBasicAuth":"n8n instance auth"},"typeVersion":1},{"name":"Download Raw Content","type":"n8n-nodes-base.httpRequest","position":[600,500],"parameters":{"url":"={{$json[\"download_url\"]}}","options":{},"authentication":"headerAuth","responseFormat":"string"},"credentials":{"httpHeaderAuth":"GitHub Token"},"typeVersion":1},{"name":"transform","type":"n8n-nodes-base.function","position":[390,300],"parameters":{"functionCode":"const newItems = [];\nfor (item of items[0].json.data) {\n  newItems.push({json: item});\n}\nreturn newItems;"},"typeVersion":1},{"name":"Daily at 23:59","type":"n8n-nodes-base.cron","position":[-20,300],"parameters":{"triggerTimes":{"item":[{"hour":23,"minute":59}]}},"typeVersion":1},{"name":"Merge1","type":"n8n-nodes-base.merge","position":[970,610],"parameters":{"mode":"removeKeyMatches","propertyName1":"data.updatedAt","propertyName2":"data.updatedAt"},"typeVersion":1}],"connections":{"Merge":{"main":[[{"node":"Create file","type":"main","index":0}]]},"Merge1":{"main":[[{"node":"GitHub Edit","type":"main","index":0}]]},"Get Files":{"main":[[{"node":"Transform","type":"main","index":0}]]},"Transform":{"main":[[{"node":"Download Raw Content","type":"main","index":0}]]},"transform":{"main":[[{"node":"Get workflow data","type":"main","index":0}]]},"Get workflows":{"main":[[{"node":"transform","type":"main","index":0}]]},"Daily at 23:59":{"main":[[{"node":"Get workflows","type":"main","index":0}]]},"Get workflow data":{"main":[[{"node":"Merge","type":"main","index":0},{"node":"Merge1","type":"main","index":0}]]},"Download Raw Content":{"main":[[{"node":"Merge","type":"main","index":1},{"node":"Merge1","type":"main","index":1}]]}}}