This is my attempt of authenticating a user with twitch and making a request on their behalf

twitch_oauth.py

from flask import Flask, render_template, request, redirect, session, json, url_for, jsonify
from flask_oauthlib.client import OAuth
from config import Config

app = Flask(__name__)
# Debug info
app.debug = True

f = file('config.json')
cfg = Config(f)

app.secret_key = cfg.config.app.secret

# OAuth Config
oauth = OAuth(app)
twitch = oauth.remote_app('twitch',
                              base_url='https://api.twitch.tv/kraken/',
                              request_token_url=None,
                              access_token_method='POST',
                              access_token_url='oauth2/token/',
                              authorize_url='oauth2/authorize/',
                              consumer_key=cfg.config.twitch.dev_client_id,
                              consumer_secret=cfg.config.twitch.dev_secret_key,
                              request_token_params={'scope': [
                                  'user_read',
                                  'channel_subscriptions',
                                  'channel_editor',
                                  'channel_commercial'
                              ]},
                              )
def change_twitch_header(uri, headers, body):
    auth = headers.get('Authorization')
    if auth:
        auth = auth.replace('Bearer', 'OAuth2')
        headers['Authorization'] = auth
    if app.debug:
        headers['Client-ID'] = cfg.config.twitch.dev_client_id
    else:
        headers['Client-ID'] = cfg.config.twitch.client_id
    return uri, headers, body


twitch.pre_request = change_twitch_header

@app.route("/login/")
def login():
    from app import twitch
    return twitch.authorize(callback=url_for('user.authorized', _external=True))


@app.route("/login/authorized/")
def authorized():
    from app import twitch, cfg, mongo
    from flask_oauthlib.client import OAuthException
    resp = twitch.authorized_response()
    if resp is None:
        return 'Access denied: reason=%s error=%s' % (
            request.args['error'],
            request.args['error_description']
        )
    if isinstance(resp, OAuthException):
        return 'Access denied: %s' % resp.message

    session['twitch_token'] = (resp['access_token'], '')
    me = twitch.get('channel/')
    session['twitch_name'] = (me.data['name'])
    return redirect(url_for('dashboard_page.dashboard', username=me.data['name']))


@app.route("/logout/")
def logout():
    session.pop('twitch_token', None)
    session.pop('twitch_name')
    resp = make_response(redirect(url_for('landing_page.index')))
    resp.set_cookie('twitch_name', '', expires=0)
    return resp