Calling external REST API in 1.3 style

Hello,
currently I’m working on small project, where I have to login/logout using external REST API. How can I do it in Meteor 1.3?
Let’s say I have POST call like this:
http://some.webpage.com/login?username=user&password=pass123

Probably whatever you were doing in Meteor 1.2 will work just the same!