Refresh Subscriber token
Exchanges a valid refresh token for a new [subscriber](/docs/platform/subscribers) access token and a new refresh token. The new access token is valid for 2 hours, and the new refresh token is valid for 2 hours and 5 minutes.
#### Permissions
The API token used to authenticate must have the following scope(s) enabled to make a successful request: _Voice_, _Messaging_, _Fax_, or _Video_.
[Learn more about API scopes](/docs/platform/your-signalwire-api-space).