HTTPError: 401 Client Error

[cfadkins]

Having problems installing Oscar. He gets to the trello_api.boards.new_list(

Traceback (most recent call last):
  File "./install.py", line 207, in <module>
    trello_api.boards.new_list(trello_grocery_board, 'Groceries')
  File "/usr/local/lib/python2.7/dist-packages/trello/boards.py", line 123, in new_list
    resp.raise_for_status()
  File "/usr/lib/python2.7/dist-packages/requests/models.py", line 825, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 401 Client Error: Unauthorized