Refresh Token Errors
If the access token cannot be refreshed due to client errors, the response will include a status code of 400 Bad Request, and the body will be a structure with the following properties, as applicable:
|error||Identifier or name of the error|
|error_description||A longer description of the error, with information on how to address it|
|error_uri||The URL of a web page with more information about the error|
Examples of error names are invalid_request and unauthorized_client.