user_join.json

{
    "token": "{{verification_token}}",
    "team_id": "{{team_id}}",
    "api_app_id": "{{app_id}}",
    "event": {
        "type": "team_join",
        "user": {
            "id": "{{user_id}}",
            "team_id": "{{team_id}}",
            "name": "{{user_name}}",
            "deleted": false,
            "status": null,
            "real_name": "{{user_real_name}}",
            "profile": {
                "first_name": "{{user_first_name}}",
                "last_name": "{{user_last_name}}",
                "real_name": "{{user_real_name}}",
                "real_name_normalized": "{{user_real_name}}"
            },
            "is_bot": false
        }
    },
    "type": "event_callback",
    "authed_users": ["{{authed_user}}"]
}