Slack WebAPI fails with not_authed - slack

Question

I'm attempting to post interactive messages to slack as a Bot User (using chat.postMessage, etc).
Although I am passing in the Bot Access Token (as received from the initial OAuth) I keep getting an error response stating "not_authed".
I get the same when I attempt auth.test.
I'm doing something like the following with "request" in node.js:
app.get("/testAuth/test", function(req,res){
console.log("in testAuth/test...sending test message to Slack");
var bToken = process.env.TESTBOT_ACCESS_TOKEN;
var slackMessageURL = "https://slack.com/api/auth.test";
var postOptions = {
uri: slackMessageURL,
method: "POST",
token: bToken
};
request(postOptions, (error, response, body) => {
if(error){
console.log("OOPPPPS....we hit an error in auth.test: " + error);
} else {
console.log("auth.test response: " + JSON.stringify(response));
}
});
res.send("Sent Test...check logs");
});
which results with:
auth.test response: {"statusCode":200,"body":"{\"ok\":false,\"error\":\"not_authed\"}",...
According to the Slack WebAPI docs, if I'm posting as the Bot, I should use the Bot's access token (as received from the initial oauth), but figure I'm either formatting my request incorrectly, or the token is not what Slack is expecting.

Answer 1

Ok, after talking with Slack support, it appears (at least) the WebAPIs I am calling don't yet support application/json. These do work with x-www-form-urlencoded.
Looking at this post
I was able to cobble together the following which auth'd successfully:
//up top
var request = require("request");
var querystring = require("querystring");
//...
app.get("/testAuth/test", function(req,res){
console.log("in testAuth/test...sending test message to Slack");
var bToken = process.env.TESTBOT_ACCESS_TOKEN;
var message = {
token: bToken
};
var messageString = querystring.stringify(message);
var messageLength = messageString.length;
var slackMessageURL = "https://slack.com/api/auth.test";
var postOptions = {
headers: {
"Content-length": messageLength,
"Content-type": "application/x-www-form-urlencoded"
},
uri: slackMessageURL,
body: messageString,
method: "POST"
};
request(postOptions, (error, response, body) => {
if(error){
console.log("OOPPPPS....we hit an error in auth.test: " + error);
} else {
console.log("auth.test response: " + JSON.stringify(response));
}
});
res.send("Sent Test...check logs");
});