Everyone knows OAuth is a pain. Here is a little something to ease your suffering.
I would recommend running this in a virtual environment to keep your dependencies in check. If you'd like to do that, run:
sudo pip install virtualenv
Followed by:
virtualenv venv
This will create an empty virtualenv in your project directory in a folder called "venv." To enable it, run:
source venv/bin/activate
and your console window will be in that virtualenv state. To deactivate, run:
deactivate
To install all dependencies locally (preferably inside your activated virtualenv), run:
pip install -r requirements.txt
Make a copy of the example config file:
cp config_example.py config.py
Then modify your twitchalerts app's info to reflect your registered app. Make sure to bookmark the page for your twitchalerts app so you don't lose this information. To register an app, go to:
http://twitchalerts.com/oauth/apps/register
And have their documentation open as a resource:
https://twitchalerts.readme.io/docs/getting-started
For testing, I recommend setting your redirect_uri to something like:
http://127.0.0.1:8080/twitchalerts/authorized
Make sure this matches in your TwitchAlerts app settings and in config.py!
./app.py
Head to http://127.0.0.1:8080/twitchalerts/authorize to see an authorization page for the app.
From their, once approved, you'll see a returned access token, assuming all the
provided information from your app (and the redirect_uri) are correct.