Specify the redirect URLs of your front-end application. When your app user is successfully authenticated, your frontend app will be redirected to the success redirect URL. A stringified JSON response data, which includes authenticated user data and if selected, the user session data, will be provided as a query string parameter named 'response.' Similarly, if the user cannot be authenticated, in that case, your frontend app will be redirected to the error redirect URL and a stringified error JSON object will be provided in the query string parameter named 'response.'