# Access Token Expired

The access token you submitted has expired.

```json
{
  "type": "https://developers.sinch.com/docs/errors/registry/access-token-expired",
  "title": "Token expired",
  "detail": "The access token has expired. Generate a new token at https://auth.sinch.com."
}
```

## Headers

This error also sends the accompanying authentication challenge header:

```json
"Basic realm=“Realm”"
```

## Troubleshooting

Create a new access token and retry your request.