old_contents: import time
  
  from tests.integration.util import create_client
  
  
  def test_link_token_create_required():
      client = create_client()
  
      # build the configs
      configs = {
          'user': {
              'client_user_id': str(time.time()),
          },
          'products': ["auth", "transactions"],
          'client_name': "Plaid Test",
      }
  
      # create link token
      response = client.LinkToken.create(configs)
  
      # assert on response
      assert response['link_token'] is not None
      assert response['expiration'] is not None
  
  
  def test_link_token_create_optional():
      client = create_client()
  
      # build the configs
      configs = {
          'user': {
              'client_user_id': str(time.time()),
          },
          'products': ["auth", "transactions"],
          'client_name': "Plaid Test",
          'country_codes': ['GB'],
          'language': 'en',
          'webhook': 'https://sample-webhook-uri.com',
          'link_customization_name': 'default',
          'account_filters': {
              'depository': {
                  'account_subtypes': ['checking', 'savings'],
              },
          },
      }
  
      # create link token
      response = client.LinkToken.create(configs)
  
      # assert on response
      assert response['link_token'] is not None
      assert response['expiration'] is not None
  
new_contents: import time
  
  from tests.integration.util import create_client
  
  
  def test_link_token_create_required():
      client = create_client()
  
      # build the configs
      configs = {
          'user': {
              'client_user_id': str(time.time()),
          },
          'products': ["auth", "transactions"],
          'client_name': "Plaid Test",
          'country_codes': ['GB'],
          'language': 'en',
      }
  
      # create link token
      response = client.LinkToken.create(configs)
  
      # assert on response
      assert response['link_token'] is not None
      assert response['expiration'] is not None
  
  
  def test_link_token_create_optional():
      client = create_client()
  
      # build the configs
      configs = {
          'user': {
              'client_user_id': str(time.time()),
          },
          'products': ["auth", "transactions"],
          'client_name': "Plaid Test",
          'country_codes': ['GB'],
          'language': 'en',
          'webhook': 'https://sample-webhook-uri.com',
          'link_customization_name': 'default',
          'account_filters': {
              'depository': {
                  'account_subtypes': ['checking', 'savings'],
              },
          },
      }
  
      # create link token
      response = client.LinkToken.create(configs)
  
      # assert on response
      assert response['link_token'] is not None
      assert response['expiration'] is not None
  
subject: add more required fields (#233)