new_contents: import unittest
  import mock
  from ...authentication.link import Link
  
  
  class TestLink(unittest.TestCase):
  
      @mock.patch('auth0.v2.authentication.link.Link.post')
      def test_unlink(self, mock_post):
  
          l = Link('my.domain.com')
  
          l.unlink(access_token='atk', user_id='uid')
  
          args, kwargs = mock_post.call_args
  
          self.assertEqual(kwargs['url'], 'https://my.domain.com/unlink')
          self.assertEqual(kwargs['data'], {
              'access_token': 'atk',
              'user_id': 'uid',
          })
          self.assertEqual(kwargs['headers'], {
              'Content-Type': 'application/json'
          })
  
subject: Add tests for Link