question: public UserConfig fetch ( UserConfig config ) { config . addCredentials ( this ) ; String xml = POST ( this . url + "/check-user" , config . toXML ( ) ) ; Element root = parse ( xml ) ; if ( root == null ) { return null ; } try { UserConfig user = new UserConfig ( ) ; user . parseXML ( root ) ; return user ; } catch ( Exception exception ) { this . exception = SDKException . parseFailure ( exception ) ; throw this . exception ; } }
target:  Fetch the user details for the user credentials. A token or password is required to validate the user.