Doubt with xhr.Answer

Question

I have the following Javascript code:

function load(){
    var validationEmail = Email.value;
    var validaationCode = Code.value;

    var json = JSON.stringify({"userName": validationEmail, "codeCustomer": validaationCode});
    var url = "http://minha url";
    var xhr = new XMLHttpRequest();

    xhr.onreadystatechange = function(){
         if (xhr.readyState === 4) {
             console.log(xhr.response);

             if(xhr.response.value != false){

                console.log("kkkkkkk");
                document.getElementById("rootSingUp").innerHTML = loadSingUpPG1();
             }
        }
    }

    xhr.open("POST",url,true);
    xhr.setRequestHeader("Content-Type", "application/json");
    xhr.send(json);
}

This code is generating a JSON and sending it to my web service and with xhr.Answer if I’m getting the return of this request.

In the first IF, when I give console.log(xhr.Response) he returns me true or false correctly.

but when I try to run the second if it doesn’t even enter that second condition