The redirect URI allows a server to act on behalf of a user. After a user login, a code variable is exchanged for a long lived token by the application server. More details about Oauth2 API can be found the Getting a Token page.
The default status setting of false will improve page load times. It will check for cached data before calling the login API.
By setting status to true, the SDK will refresh the user authentication information instead of retreiving previously loaded data.