grafana-air-auto-login.js

(function() {
  const IS_LEGACY = +grafanaBootData.settings.buildInfo.version.split('.')[0] <= 6;
  const user = prompt('Enter the username:', get(window, 'grafanaBootData.user.login', ''));
  const pass = prompt(`Enter the password for "${user}":`);
  const redirect = location.pathname + location.search;
  const t = IS_LEGACY
    ? {
      user,
      pass,
      logout: /^YES$/i.test(prompt('If a previous user is logged in, should he be logged out? (Yes/No)', 'Yes')),
      redirect
    }
    : { u: user, p: pass, r: redirect };
  const url = `${location.origin}/public/views/auto-login.html?t=${btoa(JSON.stringify(t))}`;
  document.body.innerHTML = `
    Here is the AutoLogin URL:<br />
    <a href="${url}" target="_blank">${url}</a><br />
    <br />
    <button onclick="location.reload()" type="button" class="btn btn-primary">Go Back To AIR</button>
  `;
  document.body.style.cssText = 'font-family:monospace;white-space:pre-wrap;word-wrap:break-word;padding:1em;';
  
  function get(root, path, opt_default) {
    let result = path.split('.').reduce(function(result, key) {
      return result == undefined ? result : result[key]
    }, root);
    return result === undefined ? opt_default : result;
  }
})();

Here is the YourJS Bookmarklet Creator that can be used to turn this into a bookmarklet.