### error

Traceback (most recent call last):
  File ".\aws_ec2_list_instances.py", line 416, in <module>
    main()
  File ".\aws_ec2_list_instances.py", line 380, in main
    get_page_info(auth, pageid)
  File ".\aws_ec2_list_instances.py", line 254, in get_page_info
    r = requests.get(url, auth = auth)
  File "C:\Users\tdunphy\AppData\Local\Programs\Python\Python37-32\lib\site-packages\requests\api.py", line 75, in get
    return request('get', url, params=params, **kwargs)
  File "C:\Users\tdunphy\AppData\Local\Programs\Python\Python37-32\lib\site-packages\requests\api.py", line 60, in request
    return session.request(method=method, url=url, **kwargs)
  File "C:\Users\tdunphy\AppData\Local\Programs\Python\Python37-32\lib\site-packages\requests\sessions.py", line 519, in request
    prep = self.prepare_request(req)
  File "C:\Users\tdunphy\AppData\Local\Programs\Python\Python37-32\lib\site-packages\requests\sessions.py", line 462, in prepare_request
    hooks=merge_hooks(request.hooks, self.hooks),
  File "C:\Users\tdunphy\AppData\Local\Programs\Python\Python37-32\lib\site-packages\requests\models.py", line 317, in prepare
    self.prepare_auth(auth, url)
  File "C:\Users\tdunphy\AppData\Local\Programs\Python\Python37-32\lib\site-packages\requests\models.py", line 548, in prepare_auth
    r = auth(self)
TypeError: 'str' object is not callable

### Code
def get_page_info(auth, pageid):
    url = '{base}/{pageid}'.format(
        base = BASE_URL,
        pageid = pageid)
    r = requests.get(url, auth = auth)
    r.raise_for_status()
    return r.json()