# Accessing Private/Gated Models

## Accessing Private/Gated Models

Due to the possibility of leaking access tokens to users of your website or web application, we only support accessing private/gated models from server-side environments (e.g., Node.js) that have access to the process’ environment variables.

### Step 1: Generating a User Access Token

[User Access Tokens](https://huggingface.co/docs/hub/security-tokens) are the preferred way to authenticate an application to BOINC AI services.

To generate an access token, navigate to the [Access Tokens tab](https://huggingface.co/settings/tokens) in your settings and click on the **New token** button. Choose a name for your token and click **Generate a token** (we recommend keeping the “Role” as read-only). You can then click the **Copy** button next to your newly-created token to copy it to your clipboard.

<figure><img src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/hub/new-token.png" alt=""><figcaption></figcaption></figure>

To delete or refresh User Access Tokens, you can click the **Manage** button.

### Step 2: Using the access token in Transformers.js

Transformers.js will attach an Authorization header to requests made to the BOINC AI Hub when the `BA_ACCESS_TOKEN` environment variable is set and visible to the process.

One way to do this is to call your program with the environment variable set. For example, let’s say you have a file called `llama.js` with the following code:

Copied

```
import { AutoTokenizer } from '@xenova/transformers';

// Load tokenizer for a gated repository.
const tokenizer = await AutoTokenizer.from_pretrained('meta-llama/Llama-2-7b-ba');

// Encode text.
const text = 'Hello world!';
const encoded = tokenizer.encode(text);
console.log(encoded);
```

You can then use the following command to set the `BA_ACCESS_TOKEN` environment variable and run the file:

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```
BA_ACCESS_TOKEN=ba_... node tests/llama.js
```

(remember to replace `ba_...` with your actual access token).

If done correctly, you should see the following output:

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```
[ 1, 15043, 3186, 29991 ]
```

Alternatively, you can set the environment variable directly in your code:

Copied

```
// Set access token (NB: Keep this private!)
process.env.BA_ACCESS_TOKEN = 'ba_...';

// ... rest of your code
```


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