Workflow: Manual Mailgun Automate

{
    "nodes": [
        {
            "name": "On clicking 'execute'",
            "type": "n8n-nodes-base.manualTrigger",
            "position": [
                250,
                300
            ],
            "parameters": [],
            "typeVersion": 1
        },
        {
            "name": "Mailgun",
            "type": "n8n-nodes-base.mailgun",
            "position": [
                450,
                300
            ],
            "parameters": {
                "text": "This is a test message ",
                "subject": "This is a Subject",
                "toEmail": "user2@example.com",
                "fromEmail": "user@example.com"
            },
            "credentials": {
                "mailgunApi": "mailgun-creds"
            },
            "typeVersion": 1
        }
    ],
    "connections": {
        "On clicking 'execute'": {
            "main": [
                [
                    {
                        "node": "Mailgun",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        }
    }
}