Unable to install libraries for google drive api? (in pycharm)

I've been following the instructions on the quickstart page for google drive api v3 (I'm learning python and I want to try create a program that invol开发者_如何转开发ves downloading images from google drive) but I'm unable to install the required packages

it tells me to run this program in terminal to install the libraries

pip install --upgrade google-api-python-client google-auth-httplib2 google-auth-oauthlib

and I'm told that it succeeded (trying to do so again tells me that requirements have already been satisfied) but the red error lines still exist and i'm told that its a "unresolved reference"