Issue: A 401 error occurs when there is a bad Dispatch token or Global Commerce User API token.
Resolution: Issue an API call to identify where the token originated and when it expired. For example:
GET /oauth20/access-tokens?token=your_access_token HTTP/1.1 Host: api.digitalriver.com
The response shows you where the token originated in the domain field and when it expired in the expiresIn field.