docs: def get_profile_data(self, auth_response):
          """ Retrieve profile data from provider """
          res = auth_response
          token = res.get('access_token')
          expires = res.get('expires_in')
          expires = datetime.utcnow() + timedelta(seconds=int(expires))
  
          session[self.session_key] = (token, expires)
  
          me = oauth.facebook.get('me?fields=email,name')
          if me.status != 200:
              return None
  
          me = me.data
          email = me.get('email')
          id = me.get('id')
          if not id:
              raise x.UserException('Facebook must return a user id')
  
          data = dict(
              provider=self.provider,
              email=email,
              id=id,
              token=token,
              expires=expires
          )
  
          return data