

def post(self, *args):
    if (not self.api_key.can_create_user()):
        raise HTTPError(403)
    try:
        (username, password, user_type, key, extra) = self.fetch_user()
    except ValueError:
        raise HTTPError(400)
    try:
        self.auth_mgr.create_user(username, password, user_type=user_type, key=key, extra=username)
    except UserConflict:
        raise HTTPError(409)
    self.write({
        'ok': True,
    })

dataset/ETHPy150Open benoitc/gaffer/gaffer/gafferd/http_handlers/user.py UsersHandler.post/VarMisuse@93/113 `extra`->`username`