The authorization code that is exchanged for an access token.
When ClientProfile is set to cfWebServer (WebServer flow) the authorization server will return a code when the user is re-directed from the authorization server back to your website. This code is returned as a query string parameter and the class will automatically populate this property with that value.
If this property is set before calling GetAuthorization the class will attempt to exchange the code with the authorization server for an access token.
This property is not available at design time.