Merge pull request #1654 from DuendeSoftware/joe/device-flow-log-fix

Fix error log when device authorization endpoint fails

src/IdentityServer/Endpoints/DeviceAuthorizationEndpoint.cs

@@ -122,7 +122,7 @@ private TokenErrorResult Error(string error, string errorDescription = null, Dic
             Custom = custom
         };
 
-        _logger.LogError("Device authorization error: {error}:{errorDescriptions}", error, error ?? "-no message-");
+        _logger.LogError("Device authorization error: {error}:{errorDescriptions}", error, errorDescription ?? "-no message-");
 
         return new TokenErrorResult(response);
     }