text: from allauth.socialaccount import providers
  from allauth.socialaccount.providers.base import ProviderAccount
  from allauth.socialaccount.providers.oauth2.provider import OAuth2Provider
  
  
  class BitlyAccount(ProviderAccount):
      def get_profile_url(self):
          return self.account.extra_data.get('profile_url')
  
      def get_avatar_url(self):
          return self.account.extra_data.get('profile_image')
  
      def to_str(self):
          dflt = super(BitlyAccount, self).to_str()
          return '%s (%s)' % (
              self.account.extra_data.get('full_name', ''),
              dflt,
          )
  
  
  class BitlyProvider(OAuth2Provider):
      id = 'bitly'
      name = 'Bitly'
      account_class = BitlyAccount
  
      def extract_uid(self, data):
          return str(data['login'])
  
      def extract_common_fields(self, data):
          return dict(username=data['login'],
                      name=data.get('full_name'))
  
  
  providers.registry.register(BitlyProvider)
  