> For the complete documentation index, see [llms.txt](https://docs.parallels.com/landing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.parallels.com/landing/ras-client-integration-guide/ras-web-client-api/authentication-handoff-api/example.md).

# Example

The example below launches published resource `2` for a user from a browser page on your portal. The payload is submitted as a standard form-style POST so that the browser follows the Gateway's 302 redirect as a top-level navigation.

```html
<script>
function launchResource(username, password) {
  const payload = {
    username: username,
    password: password,
    login: "https://your-portal.example.com/login",
    logout: "https://your-portal.example.com/logout",
    appid: 2,
    theme: "dark",
    extra: {
      redirectLinks: true,
      redirectSound: true
    }
  };

  // Submit as a top-level POST so the browser follows the 302 redirect
  const form = document.createElement("form");
  form.method = "POST";
  form.action = "https://gateway.example.com/userportal/auth-handoff";

  // <adjust field encoding to match the Gateway's expected content type>

  document.body.appendChild(form);
  form.submit();
}
</script>
```

After the POST:

1. The Gateway validates the credentials.
2. The Gateway responds with a `302` and a **Location** header pointing to the User Portal destination.
3. The browser navigates to the User Portal, where the user is signed in, and resource `2` is launched.

To sign the user in to the User Portal without launching a specific resource, omit **appid** — the user will see all published resources available to them.


---

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