How can I auto login to github with user script?

How can i login to github when i run one time script. I'm using google chrome dev tools in source>snipptes Is it async problem?
Problem: Required is run twice script. Ctrl + Enter

let userInfoInput = "login-field";
let userPwdInput = "password";
let submitBtn = "input[name='commit']";
let url = "https://github.com/login";

async function navigateTo(url) {
  window.location.href = url;
}

async function sendInput() {
  document.getElementById(userInfoInput).value = "testuser";
  document.getElementById(userPwdInput).value = "123456";
}

async function clickButton() {
  let btn = document.querySelector(submitBtn);
  btn.click();
}

//navigateTo(url);  //Problem is here
sendInput();
clickButton();

I tried sleep but doesn't work