slack bot error: 'user_is_bot' for channels.join - slack-api

Question

I am trying to create a new channel using slack api https://api.slack.com/methods/channels.join but getting this response
info: ** API CALL: https://slack.com/api/channels.join
Response : { ok: false, error: 'user_is_bot' }
I tried this
controller.hears('hello', ['direct_message', 'direct_mention', 'mention'], function (bot, message) {
bot.api.channels.join({'name':'nag'}, function (err, response) {
console.log("Response : ",response);
})
});
If I am mistaken please let me know. I have started learning slack api.

Answer 1

The reason you are getting user_is_bot is that channels.join can not be used by a bot user. As it says in the documentation for this method:
user_is_bot: This method cannot be called by a bot user.
To create channel you will want to use channels.create. However, that method can also not be used by a bot user.
The common solution is to use the full access_token, not the bot_access_token that your Slack app received from Slack after installing it with OAuth for all methods that bot users can not use, e.g. creating a new channel.
Here is the example from the OAuth documentation on how the response from Slack with both tokens look like:
{
"access_token": "xoxp-XXXXXXXX-XXXXXXXX-XXXXX",
"scope": "incoming-webhook,commands,bot",
"team_name": "Team Installing Your Hook",
"team_id": "XXXXXXXXXX",
"incoming_webhook": {
"url": "https://hooks.slack.com/TXXXXX/BXXXXX/XXXXXXXXXX",
"channel": "#channel-it-will-post-to",
"configuration_url": "https://teamname.slack.com/services/BXXXXX"
},
"bot":{
"bot_user_id":"UTTTTTTTTTTR",
"bot_access_token":"xoxb-XXXXXXXXXXXX-TTTTTTTTTTTTTT"
}
}