backoffice/web/js/library.js

function checkToken(){

    instance.get("token", { withCredentials: true})
    .then(function(response) { 
        if(location.pathname == "/") 
        { 
            location.href="/html/home.html"; 
        }
    })
    .catch(function(error){
        if(location.pathname != "/"){
            location.href="/";
        }
    });

}