old_contents: """
  Docker.io OAuth2 backend, docs at:
      http://psa.matiasaguirre.net/docs/backends/docker.html
  """
  from social.backends.oauth import BaseOAuth2
  
  
  class DockerOAuth2(BaseOAuth2):
      name = 'docker'
      ID_KEY = 'user_id'
      AUTHORIZATION_URL = 'https://www.docker.io/api/v1.1/o/authorize/'
      ACCESS_TOKEN_URL = 'https://www.docker.io/api/v1.1/o/token/'
      REFRESH_TOKEN_URL = 'https://www.docker.io/api/v1.1/o/token/'
      ACCESS_TOKEN_METHOD = 'POST'
      REDIRECT_STATE = False
      EXTRA_DATA = [
          ('refresh_token', 'refresh_token', True),
          ('user_id', 'user_id'),
          ('email', 'email'),
          ('full_name', 'fullname'),
          ('location', 'location'),
          ('url', 'url'),
          ('company', 'company'),
          ('gravatar_email', 'gravatar_email'),
      ]
  
      def get_user_details(self, response):
          """Return user details from Docker.io account"""
          fullname, first_name, last_name = self.get_user_names(
              response.get('full_name') or response.get('username') or ''
          )
          return {
              'username': response.get('username'),
              'fullname': fullname,
              'first_name': first_name,
              'last_name': last_name,
              'email': response.get('email', '')
          }
  
      def user_data(self, access_token, *args, **kwargs):
          """Grab user profile information from Docker.io."""
          username = kwargs['response']['username']
          return self.get_json(
              'https://www.docker.io/api/v1.1/users/%s/' % username,
              headers={'Authorization': 'Bearer %s' % access_token}
          )
  
new_contents: """
  Docker Hub OAuth2 backend, docs at:
      http://psa.matiasaguirre.net/docs/backends/docker.html
  """
  from social.backends.oauth import BaseOAuth2
  
  
  class DockerOAuth2(BaseOAuth2):
      name = 'docker'
      ID_KEY = 'user_id'
      AUTHORIZATION_URL = 'https://hub.docker.com/api/v1.1/o/authorize/'
      ACCESS_TOKEN_URL = 'https://hub.docker.com/api/v1.1/o/token/'
      REFRESH_TOKEN_URL = 'https://hub.docker.com/api/v1.1/o/token/'
      ACCESS_TOKEN_METHOD = 'POST'
      REDIRECT_STATE = False
      EXTRA_DATA = [
          ('refresh_token', 'refresh_token', True),
          ('user_id', 'user_id'),
          ('email', 'email'),
          ('full_name', 'fullname'),
          ('location', 'location'),
          ('url', 'url'),
          ('company', 'company'),
          ('gravatar_email', 'gravatar_email'),
      ]
  
      def get_user_details(self, response):
          """Return user details from Docker Hub account"""
          fullname, first_name, last_name = self.get_user_names(
              response.get('full_name') or response.get('username') or ''
          )
          return {
              'username': response.get('username'),
              'fullname': fullname,
              'first_name': first_name,
              'last_name': last_name,
              'email': response.get('email', '')
          }
  
      def user_data(self, access_token, *args, **kwargs):
          """Grab user profile information from Docker Hub."""
          username = kwargs['response']['username']
          return self.get_json(
              'https://hub.docker.com/api/v1.1/users/%s/' % username,
              headers={'Authorization': 'Bearer %s' % access_token}
          )
  
subject: Update docker backend with Docker Hub endpoints