> ## Documentation Index
> Fetch the complete documentation index at: https://composio-27-feat-docs-revamp.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# 🛠️ How Can I Use Tools and Actions With Existing Authentication?

> Guide to using existing authentication with tools and actions

### Using Tools and Actions with Existing Authentication

Composio allows you to [execute actions directly](action-guide-without-agents) using existing authentication, in this guide we'll see how to star a repo on GitHub using `GITHUB_STAR_A_REPOSITORY_FOR_THE_AUTHENTICATED_USER` action and passing the **Bearer token** in the headers. You can get the connection paramateters of a connected account like the access token using SDK, learn more [here](../..//Auth/using-connections#fetch-the-connection-parameters)

<Tabs>
  <Tab title="Python">
    Install packages:

    ```bash
    pip install composio-core
    ```

    Use the `add_auth` method to add the existing authentication to the toolset for the app you want to use. `in_` is where you want to add the auth, `name` is the name of the header you want to add and `value` is the value of the header.

    ```python {7-13}
    from composio import ComposioToolSet, App

    toolset = ComposioToolSet()

    toolset.add_auth(
        app=App.GITHUB,
        parameters=[
            dict(
                name="Authorization",
                in_="header",
                value="Bearer gho_XL9IXXXXXX",
            )
        ],
    )

    toolset.execute_action(
        action="GITHUB_STAR_A_REPOSITORY_FOR_THE_AUTHENTICATED_USER",
        params={"owner": "composiohq", "repo": "composio"},
    )
    ```
  </Tab>

  <Tab title="JavaScript">
    Install packages:

    ```bash
    npm install composio-core
    ```

    Here you need to pass the authentication parameters inside the `authConfig`. `in_` is where you want to add the auth, `name` is the name of the header you want to add and `value` is the value of the header.

    ```javascript {10-14}
    import { OpenAIToolSet } from "composio-core";

    const toolset = new OpenAIToolSet();

    const response = await toolset.client.actions.execute({
        actionName: "GITHUB_STAR_A_REPOSITORY_FOR_THE_AUTHENTICATED_USER",
        requestBody: {
            appName: "github",
            authConfig: {
                parameters: [{
                    name: "Authorization",
                    in: "header",
                    value: `Bearer gho_XL9IXXXXXX`
                }]
            },
            input: {
                "owner": "composiohq",
                "repo": "composio"
            }
        }
    });

    console.log(response)
    ```
  </Tab>
</Tabs>