Multiple messages

You can send multiple messages in a row.

You need to add in the question Json a new field messages:

"messages" : [
    {
        "type" : "text",
        "text" : "Invite ' + params.name + ' a te défier"
    },
    {
        "type" : "image",
        "url" : "https://media.giphy.com/media/Zyxqw4a2ZrClq/giphy.gif"
    }
]

Here are the types of messages you can send :