'Iterate over all assignees to which an issue may be assigned.
:param int number: (optional), number of assignees to return. Default:
-1 returns all available assignees
:param str etag: (optional), ETag from a previous request to the same
endpoint
:returns: generator of :class:`~github3.users.User`\ s'

def assignees(self, number=(-1), etag=None):

    url = self._build_url(u'assignees', base_url=self._api)
    return self._iter(int(number), url, users.ShortUser, etag=etag)
