How to use the smartcar.Vehicle function in smartcar

def setUpClass(cls):
        super(TestVehicleDisconnectE2E, cls).setUpClass()

        access_object = cls.client.exchange_code(cls.code)

        access_token = access_object['access_token']
        vehicle_ids = smartcar.get_vehicle_ids(access_token)
        cls.vehicle = smartcar.Vehicle(
            vehicle_ids['vehicles'][0],
            access_token)

def setUp(self):
        self.access_token = 'access_token'
        self.vehicle_id = 'vehicle_id'
        self.vehicle = smartcar.Vehicle(self.vehicle_id, self.access_token)
        self.auth = 'Bearer ' + self.access_token

cars of different makes with our application. We then render a list of these
  vehicles.
  """
  # ensure that there is an access token
  if not 'access' in db:
    return redirect('/')
  if smartcar.expired(db['access']['expiration']): # there is a token, but check if it is expired
    db['access'] = client.exchange_token(db['access']['refresh_token']) # use our refresh token to obtain a new access object

  # get the access token from the access object. We pass this to all smartcar calls
  access_token = db['access']['access_token']
  vehicle_ids = client.get_vehicles(access_token)['vehicles'] # get list of vehicles this user has authorized

  vehicles = []
  for vehicle_id in vehicle_ids:
    vehicles.append(smartcar.Vehicle(vehicle_id, access_token))

  vehicles[1].set_unit('imperial')
  data = [get_data(vehicle) for vehicle in vehicles]
  # return "<pre>" + json.dumps(data, indent=2) + "</pre>"
  return render_template('vehicles.html', vehicles=data)