You'll need to register an 'app' with Weekdone, as per their API docs.
CLIENT_ID={provided by weekdone app registration}
CLIENT_SECRET={provided by weekdone app registration}
REDIRECT_URL=https://localhost # this does not need to be valid, we just use it to snag the auth code
USER=you@example.com
PASSWORD=your_password_here
Login, to get a session cookie