code: def list_roles(self, mount_point=DEFAULT_MOUNT_POINT):
          
          api_path = '/v1/auth/{mount_point}/roles'.format(mount_point=mount_point)
          response = self._adapter.list(
              url=api_path
          )
          return response.json().get('data')
docs: List all the roles that are registered with the plugin.
  
          Supported methods:
              LIST: /auth/{mount_point}/roles. Produces: 200 application/json
  
  
          :param mount_point: The "path" the azure auth method was mounted on.
          :type mount_point: str | unicode
          :return: The "data" key from the JSON response of the request.
          :rtype: dict