code: def validate_config(self, organization, config, actor=None):
          
          if config.get('name'):
              client = self.get_client(actor)
              try:
                  repo = client.get_repo(config['name'])
              except Exception as e:
                  self.raise_error(e)
              else:
                  config['external_id'] = six.text_type(repo['id'])
          return config
docs: ```
          if config['foo'] and not config['bar']:
              raise PluginError('You cannot configure foo with bar')
          return config
          ```