'Show that a user can retrieve any user\'s followers.'

def test_followers(self):

    cassette_name = self.cassette_name('followers')
    with self.recorder.use_cassette(cassette_name):
        user = self.gh.user('sigmavirus24')
        followers = list(user.followers(50))
    assert (len(followers) > 0)
    for follower in followers:
        assert isinstance(follower, github3.users.ShortUser)
