An AuthToken is a security element that identifies a user that has correctly authenticated with a producer. It is a 256-byte base-64 alphanumeric string, like 634a3b26dd4f ... 2cPWqcZVUfG01D2.
Each AuthToken has a limited life span. The default is 180 minutes. If any API call is performed with an expired AuthToken, an HTTP/403 Unauthorized status is returned in response.
After its expiration, an AuthToken can be renewed either by asking the user to repeat the authentication process, or by invoking the PUT Refresh AuthToken API.