The well known OAuth 2 error code. These are well known values, see http://tools.ietf.org/html/rfc6749.
Text providing additional information, used to assist the client developer in understanding the error that occurred.
The error code that results if the user denies the authorization.
Represents an OAuth 2 error. See http://tools.ietf.org/html/rfc6749 for more information on OAuth and OAuth errors.