Slack slash命令：设置机器人名称和图标

Question

我正在尝试使节点松弛机器人。当我从Slack上路时，

app.get('/testbot', testbot);

我打电话给testbot：

testbot.js：

postToSlack(botPayload, function (error, status, body) {
     console.log('successfully posted to slack');
});

我将有效负载对象发布到Slack API中指定的Webhook网址：“https://hooks.slack.com/services/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”

function postToSlack (payload, callback) {
    var val = JSON.stringify(payload);
    request({
        uri: 'https://hooks.slack.com/services/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&payload=val',
        method: 'POST'
    }, function (error, response, body) {
        if (error) {
            return callback(error);
        }
        console.log('RESPONSE', body); //takes forever, then eventually comes back as { }
        callback(null, response.statusCode, body);
    });
}

console.log('RESPONSE', body)不返回任何内容。

我的测试botPayload对象如下：

var botPayload = {};
botPayload.text = 'This should be working';
botPayload.username = 'my_new_bot';
botPayload.channel = '#mychannel';
botPayload.icon_url = 'http://i.imgur.com/IciaiJt.png';

我在这里做错了什么？

如何从帖子中删除BOT标签？