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Google OAuth 2 Tutorial
==========================
Setup a new web project in the `Google Cloud Console`, (application type: web application)_
When you have obtained a ``client_id``, ``client_secret``, and registered
a callback URL then you can try out the command line interactive example below.
.. _`Google Cloud Console`: https://cloud.google.com/console/project
.. code-block:: pycon
>>> # Credentials you get from registering a new application
>>> client_id = '<the id you get from google>'
>>> client_secret = '<the secret you get from google>'
>>> redirect_uri = 'https://your.registered/callback'
>>> # OAuth endpoints given in the Google API documentation
>>> authorization_base_url = "https://accounts.google.com/o/oauth2/v2/auth"
>>> token_url = "https://www.googleapis.com/oauth2/v4/token"
>>> scope = [
... "openid",
... "https://www.googleapis.com/auth/userinfo.email",
... "https://www.googleapis.com/auth/userinfo.profile"
... ]
>>> from requests_oauthlib import OAuth2Session
>>> google = OAuth2Session(client_id, scope=scope, redirect_uri=redirect_uri)
>>> # Redirect user to Google for authorization
>>> authorization_url, state = google.authorization_url(authorization_base_url,
... # offline for refresh token
... # force to always make user click authorize
... access_type="offline", prompt="select_account")
>>> print('Please go here and authorize:', authorization_url)
>>> # Get the authorization verifier code from the callback url
>>> redirect_response = input('Paste the full redirect URL here: ')
>>> # Fetch the access token
>>> google.fetch_token(token_url, client_secret=client_secret,
... authorization_response=redirect_response)
>>> # Fetch a protected resource, i.e. user profile
>>> r = google.get('https://www.googleapis.com/oauth2/v1/userinfo')
>>> print(r.content)
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