UserHandler

To get a new instance, either create an inline variable or use your favorite Locator:

//inline var
var handler = new UserHandler();

//MVVMLight (or any other Locator):
SimpleIoc.Default.Register<IUserHandler>(()=> new UserHandler());

If you want to add the "If-Modified-Since"-Header and "User-Agent"-Header, just fill in the parameters:

//inline var
var handler = new UserHandler(DateTime.Now, "MyAwesomeApp", "1.0.0");

//MVVMLight (or any other Locator):
SimpleIoc.Default.Register<IUserHandler>(()=> new UserHandler(DateTime.Now, "MyAwesomeApp", "1.0.0"));

get a user info by its id:

var user = handler.GetUserAsync("yourBaseUrl", 12345);

Above call will result in a WordPressEntity<TWordPressEntity>. If there was an error on the API side, the Error property will be filled, otherwise it will be null and the Value will hold the result.