How to use an http endpoint in Swift--more details in body

New to using API's with iOS development and all. Lets say I have an endpoint:

http://ift.tt/1HbUMTL

So the user will input an email address, and PIN, and the device identifier (UDID) will go as well. The response will be saved into memory.

How can I make an HTTP request and save the response basically in Swift?