Create a channel, add a member, and post a message to the channel

{
  "id": "178",
  "name": "Create a channel, add a member, and post a message to the channel",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        270,
        340
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "name": "Mattermost",
      "type": "n8n-nodes-base.mattermost",
      "position": [
        470,
        340
      ],
      "parameters": {
        "teamId": "4zhpirmh97fn7jgp7qhyue5a6e",
        "channel": "docs",
        "resource": "channel",
        "displayName": "Docs"
      },
      "credentials": {
        "mattermostApi": "Mattermost Credentials"
      },
      "typeVersion": 1
    },
    {
      "name": "Mattermost1",
      "type": "n8n-nodes-base.mattermost",
      "position": [
        670,
        340
      ],
      "parameters": {
        "userId": "5oiy71hukjgd9eprj1o4a3poio",
        "resource": "channel",
        "channelId": "={{$node[\"Mattermost\"].js...