ibm-cloud-sdk-core/build/docs/ibm-cloud-sdk-core.bearertokenauthenticator.authenticate.md

Core functionality to support SDKs generated with IBM's OpenAPI SDK Generator.

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[Home](./index.md) &gt; [ibm-cloud-sdk-core](./ibm-cloud-sdk-core.md) &gt; [BearerTokenAuthenticator](./ibm-cloud-sdk-core.bearertokenauthenticator.md) &gt; [authenticate](./ibm-cloud-sdk-core.bearertokenauthenticator.authenticate.md)

## BearerTokenAuthenticator.authenticate() method

Add a bearer token to `requestOptions`<!-- -->. The bearer token information will be set in the Authorization property of "requestOptions.headers" in the form:

Authorization: Bearer &lt;<!-- -->bearer-token<!-- -->&gt;

**Signature:**

```typescript
authenticate(requestOptions: AuthenticateOptions): Promise<void>;
```

## Parameters

<table><thead><tr><th>

Parameter


</th><th>

Type


</th><th>

Description


</th></tr></thead>
<tbody><tr><td>

requestOptions


</td><td>

AuthenticateOptions


</td><td>

The request to augment with authentication information.


</td></tr>
</tbody></table>
**Returns:**

Promise&lt;void&gt;