NoReverseMatch error when trying to use Google OAuth 2.0 - django

Question

I am stuck on [Step 2: Redirect to Google's OAuth 2.0 server][1] of Google's Using OAuth 2.0 for Web Server Applications Guide.
I have registered my application, got my client id and secret, and have the same authorized Redirect URIs in Google Developer Console than in my app.
I am getting this error when I try to redirect the user to the google consent form.
NoReverseMatch at /login/
Reverse for '?response_type=code&client_id=&redirect_uri=http%3A%2F%2Flocalhost%3A8000%2F&scope=profile+openid+email&state=NZkfzNYMEqWIY1YG07eFxE6VL2YSip&access_type=offline&prompt=consent&include_granted_scopes=true'
this is the function that is giving the error on the return:
import google_auth_oauthlib.flow
from django.shortcuts import redirect
def authorize():
"""
Set authorization parameters and redirect to Google's OAuth 2.0
server to prompt user for consent
"""
flow = google_auth_oauthlib.flow.Flow.from_client_secrets_file(
client_config=client_secret.json,
scopes=['profile', 'openid', 'email']
)
# Indicate where the API server will redirect the user after the user completes
# the authorization flow. The redirect URI matches one of the authorized
# redirect URIs for the OAuth 2.0 client in the API Console.
flow.redirect_uri = 'http://localhost:8000/'
authorization_url, state = flow.authorization_url(
access_type='offline',
prompt='consent',
include_granted_scopes='true')
return redirect(authorization_url)