***

id: e60aebc3-2eb9-45b0-917f-24c707f655e6
title: updateToken
slug: /js/reference/signalwire/client/update-token
description: updateToken method for the SignalWire Client.
max-toc-depth: 3
----------------

### updateToken

* **updateToken**(`token`: `string`): `Promise<void>`

Update the auth token being used by the client. Use this when the old token is about to expire and you have refreshed it through OAuth2.

#### Parameters

<ParamField path="token" type="string" required={true}>
  The new token that the client should start to use.
</ParamField>

#### Returns

`Promise<void>`

Returns empty object when successful. Throws an error with the server's error message when unsuccessful.

#### Example

```javascript
import { SignalWire } from "@signalwire/js";

async function main() {
  const client = await SignalWire({
    token: "<TOKEN>",
    onRefreshToken: () => {
      let newToken = refreshToken(); // this function should refresh token as per OAuth2 protocol
      client.updateToken(newToken);
    },
  });
}
```