how to check if visualizejs is already authenticated/login in an account?

Hi i've been reviewing the visualizejs and still haven't found a way that I can figure out if a user is already authenticated in visualizejs.

myConfig = {
    auth: {
        name: "joeuser",
        password: "joeuser"
    } };
 
visualize.config(myConfig);

Here is my code for logging-in in visualizejs. What I want to know if visualizejs has a method that allows us to know if we are already logged-in to the specific account we have. I want to put a condition there where if I am still authenticated, I dont have to login again yet.