Help to create a method call with login

[enzolutions]

Hello guys

I am trying to use this library to call a remote method inside a meteor application, the remote method required the user authenticated, I manage to accomplish the task, but being honest looks I feel that my implementation is not correct. I think I must to be using a kind of promises structure.

Here my solution. any ideas are accepted

const WebSocket = require('ws');
const DDP = require("ddp.js").default

const options = {
    endpoint: "http://localhost:3300/websocket",
    SocketConstructor: WebSocket
};

let token = null;
let tokenExpires = null;
let methodInstalmentsId = null;

const ddp = new DDP(options);
 
ddp.on("connected", () => {
    console.log("Connected");

});

const myLoginParams = {
    user: {
        email: "example@example.com"
    },
    password: "STRONG PASSWORD :P"
};

const methodLoginId = ddp.method("login", [myLoginParams]);

ddp.on("result", message => {
    if (message.id === methodLoginId) {
        if (!message.error) {
            token = message.result.token;
            tokenExpires = message.result.tokenExpires;
            console.log("Logged in!");
            console.log(token);
            console.log(tokenExpires['$date']);
            // Call a secondary method after login
            methodInstalmentsId = ddp.method("instalments", [{token: token}]);
        } else {
            console.log("Error login");
        }
    }

    if (message.id === methodInstalmentsId) {
        if (!message.error) {
            console.log(message)
        } else {
            console.log('Error getting instalments', message)
        }
    }
});