ChatBot - What authentication do I need?

[daftmob]

hi everyone,
it’s been a while since I coded a bot on twitch that only read the messages of a channel
I would like to improve it and insert commands
I don’t think I specified the right scopes during my authentication
it seemed to me that the chat:read and chat:edit scopes were
here is my oauth code formatted:

https://id.twitch.tv/oauth2/authorize?
response_type=code
&client_id=<client_id>
&redirect_uri=http://localhost:3300
&scope=chat:edit+chat:read+user:edit+<other_scopes>

I have retrieved the links from this page : Getting OAuth Access Tokens | Twitch Developers
and scopes from this page : Twitch Access Token Scopes | Twitch Developers

with this authentication, i always manage to connect but my bot can’t talk
Here is my code, if the error came from this one :

const { Client } = require('tmi.js');
const oauth = {
    options: {
        debug: true,
        clientId: clientId
    },
    identity: identity,
    channels: channels,
    connection: { 
        reconnect: true,
    secure : true,
 }
};

class Bot {
    constructor() {
        this.mbClient = new Client(oauth);
    };

    connect() {
        this.mbClient.connect();
        this.mbClient.on('connected', this.onConnectedHandler);
        this.mbClient.on('message', this.onMessageListen);
    };

    onMessageListen(channel, tags, message, self) {
        if (self || !message.startsWith('!')) return;

        let msg = message.trim().toLowerCase(),
            args = msg.slice(1).split(' '),
            command = args.shift().toLowerCase();

        switch (command) {
            case 'ping':
                this.mbClient.say(channel, 'pong')
                       .then(channel => console.log(channel))
                       .catch(e => console.log(e));
                break;
        };
    };
};

thank you in advance for any help

[EDIT]

So it’s not a scope error or anything, it was an hour of code, no need to reply to this topic, thanks anyway
For the record, my error is in my function call :

const { Client } = require('tmi.js');
const oauth = {
    options: {
        debug: true,
        clientId: clientId
    },
    identity: identity,
    channels: channels,
    connection: { 
        reconnect: true,
    secure : true,
 }
};

class Bot {
    constructor() {
        this.mbClient = new Client(oauth);
    };

    connect() {
        this.mbClient.connect();
        this.mbClient.on('connected', this.onConnectedHandler);
        this.onMessageListen();
    };

    onMessageListen() {
        this.mbClient.on('message', (channel, userstate, message, self) => {
            if (self || userstate['username'] === 'mobbot' || !message.startsWith('!')) return;

            let msg = message.trim().toLowerCase(),
                args = msg.slice(1).split(' '),
                command = args.shift().toLowerCase();

            switch (command) {
                case 'ping':
                    this.mbClient.say(channel, 'pong')
                        .then(channel => console.log(channel))
                        .catch(e => console.log(e));
                    break;
            };
        });
    };
};