fetch('/users/generate-auth-options/arthur')
  .then(resp => resp.json())
  .then((optionsJSON) => {
    console.log(optionsJSON);
    return SimpleWebAuthnBrowser.startAuthentication({ optionsJSON })
  })
  .then(authResp => {
    console.log("verify");
    return fetch("/users/verify-auth", {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
      },
      body: JSON.stringify({
        authResp: authResp,
        username: "arthur"
      })
    });
  })
  .then(res => {
    console.log(res);
  })
  .catch(err => {
    console.error(err);
  });