Problems retrieving XML with Python requests

I am probably overseeing something obvious but I can't seem to figure it. I am trying a simple verification to start with using the following url.

http://ift.tt/1tBOYmR

http://ift.tt/1tBOXiO

(Here's the full documentation regarding this URL).

This is the code used for testing it out.

class Foobar():
    def __init__(self):
        pass

    def bar(self):
        client = requests.get('http://ift.tt/1tBOYmR',
            auth=(username, password))

        if client.status_code == 200:
            print "Succesfull authentication. %i"%client.status_code
        else:
            print "Authentication failed %i"%client.status_code

    print client.text

Foo = Foobar()
Foo.bar()

I got a correct response once and assumed this was the right way of going. However from this part on I only receive responses like this.

Every request send regarding the user credentials being correct or not.

I've tried various encoding and neither have affected the response in any way.