var userName = prompt("What's your name? ");
if (userName === "" || userName === null || userName === undefined) {
console.log("Please check your input");
} else {
if (userName === "Admin" || userName === "admin") {
var userPass = prompt("What's your password? ", "Use a strong password");
var message = userPass === "TheMaster" ? "Welcome" : "Wrong Password";
console.log(message);
} else {
console.log("I don't know you " + userName);
}
}