'Iterate over followers of the authenticated user.
.. versionadded:: 1.0.0
This replaces iter_followers().
:param int number: (optional), number of followers to return. Default:
-1 returns all followers
:param str etag: (optional), ETag from a previous request to the same
endpoint
:returns: generator of :class:`~github3.users.ShortUser`\ s'

@requires_auth
def followers(self, number=(-1), etag=None):

    url = self._build_url(u'user', u'followers')
    return self._iter(int(number), url, users.ShortUser, etag=etag)
